F-1 1 a2228540zf-1.htm FORM F-1

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TABLE OF CONTENTS
CHINA ONLINE EDUCATION GROUP INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
CHINA ONLINE EDUCATION GROUP INDEX TO UNAUDITED INTERIM CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

Table of Contents

As filed with the Securities and Exchange Commission on May 12, 2016

Registration No. 333-        

 

SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549



FORM F-1
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933



China Online Education Group
(Exact name of Registrant as specified in its charter)

Not Applicable
(Translation of Registrant's name into English)

Cayman Islands
(State or other jurisdiction of
incorporation or organization)
  8200
(Primary Standard Industrial
Classification Code Number)
  Not Applicable
(I.R.S. Employer
Identification Number)

6th Floor Deshi Building North,
Shangdi Street, Haidian District,
Beijing 100085, People's Republic of China
Tel: +86 10 5692-8909

(Address, including zip code, and telephone number, including area code, of Registrant's principal executive offices)



Law Debenture Corporate Services Inc.
400 Madison Avenue, Suite 4D
New York, New York 10017
+1 212 750-6474

(Name, address, including zip code, and telephone number, including area code, of agent for service)



Copies to:
     
Z. Julie Gao, Esq.
Will H. Cai, Esq.
Skadden, Arps, Slate, Meagher & Flom LLP
c/o 42/F, Edinburgh Tower, The Landmark
15 Queen's Road Central
Hong Kong
+852 3740-4700
  David T. Zhang, Esq.
Benjamin W. James, Esq.
Kirkland & Ellis International LLP
c/o 26/F, Gloucester Tower, The Landmark
15 Queen's Road Central
Hong Kong
+852 3761-3318



Approximate date of commencement of proposed sale to the public:
as soon as practicable after the effective date of this registration statement.

          If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box.    o

          If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.    o

          If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.    o

          If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.    o



CALCULATION OF REGISTRATION FEE

       
 
Title of each class of securities
to be registered

  Proposed maximum
aggregate offering
price(1)

  Amount of
registration fee

 

ordinary shares, par value US$0.0001 per share(2)(3)

  US$100,000,000   US$10,070

 

(1)
Estimated solely for the purpose of determining the amount of registration fee in accordance with Rule 457(o) under the Securities Act of 1933.

(2)
Includes ordinary shares initially offered and sold outside the United States that may be resold from time to time in the United States either as part of their distribution or within 40 days after the later of the effective date of this registration statement and the date the shares are first bona fide offered to the public, and also includes ordinary shares that may be purchased by the underwriters pursuant to an over-allotment option. These ordinary shares are not being registered for the purpose of sales outside the United States.

(3)
American depositary shares issuable upon deposit of the ordinary shares registered hereby will be registered under a separate registration statement on Form F-6 (Registration No.333-        ). Each American depositary share represents            ordinary shares.

          The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until the Registration Statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to such Section 8(a), may determine.

   


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PROSPECTUS (subject to completion)
Issued                   , 2016

The information in this preliminary prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell these securities and we are not soliciting offers to buy these securities in any jurisdiction where the offer or sale is not permitted.

                      American Depositary Shares

GRAPHIC

China Online Education Group

REPRESENTING                   ORDINARY SHARES



China Online Education Group is offering                 American depositary shares, or ADSs. Each ADS represents                  ordinary shares, par value $0.0001 per share. This is our initial public offering and no public market exists for our ADSs or our ordinary shares. We anticipate the initial public offering price of our ADSs will be between US$            and US$            per ADS.



We are an "emerging growth company" under applicable U.S. federal securities laws and are eligible for reduced public company reporting requirements.



We have applied for the listing of our ADSs on the [NYSE/NASDAQ Global Market] under the symbol "             ."



Investing in our ADSs involves risks. See "Risk Factors" beginning on page 15.



PRICE $              AN ADS



 
 
Price to
Public
 
Underwriting
Discounts and
Commissions
 
Proceeds to
Company

Per ADS

  $            $            $         

Total

  $            $            $         

We have granted the underwriters the right to purchase up to an additional                           ADSs to cover over-allotments.

The Securities and Exchange Commission and state securities regulators have not approved or disapproved these securities, or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The underwriters expect to deliver the ADSs to purchasers on                     , 2016.



MORGAN STANLEY   CREDIT SUISSE

   

                           , 2016.


LOGO


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TABLE OF CONTENTS

 
  Page  

Prospectus Summary

    1  

Risk Factors

    15  

Special Note Regarding Forward-Looking Statements

    58  

Use of Proceeds

    59  

Dividend Policy

    60  

Capitalization

    61  

Dilution

    62  

Exchange Rate Information

    64  

Enforceability of Civil Liabilities

    65  

Corporate History and Structure

    67  

Selected Consolidated Financial Data

    73  

Management's Discussion and Analysis of Financial Condition and Results of Operations

    76  

Industry Overview

    105  

Business

    109  

Regulation

    131  

Management

    148  

Principal Shareholders

    155  

Related Party Transactions

    157  

Description of Share Capital

    158  

Description of American Depositary Shares

    168  

Shares Eligible for Future Sale

    180  

Taxation

    181  

Underwriting

    189  

Expenses Relating to this Offering

    196  

Legal Matters

    197  

Experts

    198  

Where You Can Find Additional Information

    199  

Index to Consolidated Financial Statements

    F-1  

        You should rely only on the information contained in this prospectus or in any related free-writing prospectus. We have not authorized anyone to provide you with information different from that contained in this prospectus. We are offering to sell, and seeking offers to buy, the ADSs only in jurisdictions where offers and sales are permitted. The information contained in this prospectus is current only as of the date of this prospectus, regardless of the time of delivery of this prospectus or of any sale of the ADSs.

        We have not taken any action to permit a public offering of the ADSs outside the United States or to permit the possession or distribution of this prospectus outside the United States. Persons outside the United States who come into possession of this prospectus must inform themselves about and observe any restrictions relating to the offering of the ADSs and the distribution of the prospectus outside the United States.

        Until            , 2016 (the 25th day after the date of this prospectus), all dealers that buy, sell or trade ADSs, whether or not participating in this offering, may be required to deliver a prospectus. This is in addition to the obligation of dealers to deliver a prospectus when acting as underwriters and with respect to their unsold allotments or subscriptions.

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PROSPECTUS SUMMARY

        The following summary is qualified in its entirety by, and should be read in conjunction with, the more detailed information and financial statements appearing elsewhere in this prospectus. In addition to this summary, we urge you to read the entire prospectus carefully, especially the risks of investing in our ADSs discussed under "Risk Factors," before deciding whether to buy our ADSs. This prospectus contains information from an industry report commissioned by us and prepared by Frost & Sullivan, a third-party research firm, to provide information regarding our industry and market position in China. We refer to this report as the Frost & Sullivan Report.

Our Business

        Our mission is to make quality education accessible and affordable. Recognizing the strong demand for improving English proficiency and the lack of effective and affordable solutions in China, our founders started with English education as the first step of our journey.

        We are a leading online education platform in China, with core expertise in English education. According to the Frost & Sullivan Report, we are one of the top online education platforms as measured by gross billings in 2015, and the largest online English education platform in China, as measured by gross billings in 2015 and the number of available foreign teachers as of December 31, 2015.

        The charts below demonstrate our rapid growth:

GRAPHIC

        English education in China traditionally focuses on test preparation instead of improving English proficiency, especially English communication skills. To address this unmet need, we have developed proprietary online and mobile education platforms that enable students across China to take one-on-one live interactive English lessons with overseas foreign teachers, on demand, fostering the development of all aspects of English proficiency. We employ student and teacher feedback and data analytics to deliver a personalized learning experience. Our lessons are highly affordable, with each 25-minute lesson on average costing approximately RMB30 (US$5).

        We connect our students with a large pool of highly qualified foreign teachers that we have assembled using a sharing economy approach. Once our teachers have gone through our rigorous selection and training process, we give them the flexibility to deliver lessons based on their own scheduling availability, at appropriate locations of their choice, and get paid based on the number of lessons taught. This sharing economy approach has allowed us to quickly build a large team of teachers in a cost-effective manner. Our platform analyzes teachers' teaching aptitudes, feedback and rating from students and background and recommends suitable teachers to students according to their respective characteristics and learning objectives. The large pool of teachers not only allows us to provide live lessons to students on demand by

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giving them scheduling flexibility, but also ensures that we are able to accommodate and address students' individual learning behaviors and needs.

        We develop and tailor our proprietary curriculum specifically to our interactive lesson format and goal of building an interactive and immersive English learning environment. Our flagship courses, Classic English and Classic English Junior, place specific emphasis on the development of English communication skills. We complement our flagship offerings with a number of specialty courses aimed at situation-based English education and test preparation needs, such as Business English and IELTS Speaking.

        We have designed a holistic learning solution that enhances effective learning through the integration of live lessons, practice, assessment and mentoring. Our live interactive lessons allow for frequent interaction between students and teachers, which is a key factor in improving English communication skills. Prior to taking lessons, students preview course materials using exercises and illustrations, supported by a pronunciation recognition and rating system. Assessment includes post-lesson quizzes and level advancement exams, both of which help students better assess their learning outcome and identify areas for improvement. In addition, our teaching assistants mentor students by coaching them on the proper learning methods and attending to their needs throughout the learning process.

        Our proprietary online and mobile education platforms, particularly our Air Class platform, are critical to students' learning experience. The Air Class platform integrates a number of features that allows us to closely simulate, and in some ways surpass, a traditional classroom experience. Our 51Talk mobile app, which serves as an integral part of our students' overall learning experience, allows students to book and manage lessons, access pre-lesson preparation and review materials, as well as to take lessons at locations of their choice. Approximately 82.3% of our active students utilized our mobile app in the three months ended March 31, 2016.

        We have experienced significant growth in recent years. Our gross billings increased from RMB36.1 million in 2013 to RMB116.9 million in 2014, and further to RMB353.3 million (US$54.5 million) in 2015, and increased from RMB53.3 million in the three months ended March 31, 2015 to RMB154.8 million (US$24.0 million) in the three months ended March 31, 2016. We define gross billings for a specific period as the total amount of cash received for the purchase of course packages in such period, net of the total amount of refunds in such period. For discussions of gross billings and reconciliation of gross billings to net revenues, see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measure." Our net revenues increased from RMB21.7 million in 2013 to RMB52.2 million in 2014, and further to RMB154.7 million (US$23.9 million) in 2015, and increased from RMB24.4 million in the three months ended March 31, 2015 to RMB72.2 million (US$11.2 million) in the three months ended March 31, 2016. We had a net loss of RMB17.8 million, RMB101.7 million and RMB327.1 million (US$50.5 million) in 2013, 2014 and 2015, respectively. In the three months ended March 31, 2016, we had a net loss of RMB99.3 million (US$15.4 million), compared to a net loss of RMB53.7 million in the three months ended March 31, 2015.

        We have recently experienced significant growth in the K-12 online English education market. In 2015, we released our Classic English Junior course which is customized to the learning objectives and patterns of K-12 students. We have also implemented a series of targeted initiatives to better engage K-12 students and their parents. As a result, K-12 students' contribution to our overall gross billings reached 42.2% in the first quarter of 2016, compared to 34.8% and 24.5% in the fourth quarter and first quarter of 2015, respectively. In the first quarter of 2016, the higher average initial course package size of RMB6.2 thousand purchased by K-12 students and the higher referral rate of 57.4% by K-12 students, as compared to those of other demographics of our student base, further validate our focus in this market. In March 2016, we launched our 51Talk New Concept course, which is a test preparation course tailored for K-12 students and in May 2016, we introduced a new course package with teachers from North America for our K-12 students.

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Our Industry

        Driven by rapid economic growth, urbanization and higher per capita disposable income of urban households, China has experienced significant growth in the private education market. According to the Frost & Sullivan Report, China's private education market reached RMB1,057.7 billion (US$163.3 billion) in 2015, and is expected to further grow at a CAGR of 15.4% to RMB2,161.8 billion (US$333.7 billion) in 2020.

        Online education offers students easy access to a large pool of teachers, rich course materials and pre-and post-lesson support, at the time and location of their choice. Online education companies are also well positioned to gather and analyze data to deliver optimized learning experiences. We believe these characteristics are important for English language education. Online English education better facilitates frequent interaction between teachers and students and high frequency practice for knowledge reinforcement.

        Fully online English education companies have greater scalability, ability to potentially reach a significantly larger market of prospective students across a broader geographical area and translate capital savings into affordable course prices and devote more sources to developing technology and data analytics. China's online English education market in terms of gross billings increased from RMB3.4 billion (US$0.5 billion) in 2010 to RMB18.3 billion (US$2.8 billion) in 2015, representing a CAGR of 40.0%, and is expected to further increase to RMB160.9 billion (US$24.8 billion) in 2020, representing a CAGR of 54.5% from 2015.

Our Value Propositions

        We believe that the success of our platform is a direct result of the unique value propositions that we offer to both students and teachers.

    Value propositions to students

    effective English education;

    access to foreign teachers and proprietary course contents;

    flexibility to learn English anytime, anywhere; and

    highly affordable prices.

    Value propositions to teachers

    flexibility of working hours and locations;

    competitive pay; and

    sense of personal achievement.

Our Strengths

        We believe the following competitive strengths are essential for our success and differentiate us from our competitors:

    leading online education platform in China with a strong brand;

    highly effective and affordable English education program, on demand;

    innovative and scalable business model, with strong operational expertise;

    proprietary online and mobile education platforms;

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    rapidly-increasing student base and engagement; and

    visionary and passionate management team with proven track record.

Our Strategies

        Our goal is to strengthen our leading position in the online education market in China, creating a foundation upon which we can develop a global online education platform. We intend to achieve our goal by pursuing the following strategies:

    further enhance our brand image to grow our student base and increase student enrollments;

    increase our market penetration amongst K-12 students;

    expand our course offerings and enhance our teaching approaches;

    improve our online and mobile platforms;

    strengthen our technologies and data analytics capabilities; and

    pursue selective strategic acquisitions and partnerships.

Our Challenges

        The successful execution of our strategies is subject to risks and uncertainties related to our business and industry, including those relating to:

    our limited operating history with our current business model, which makes it difficult to predict our future prospects and financial performance;

    our ability to continue to attract students to purchase our course packages and to increase the spending of our students on our platform;

    our ability to maintain and enhance our brand recognition;

    our ability to conduct our sales and marketing activities cost-effectively;

    the fact we incurred, and in the future may continue to incur, net losses;

    our ability to continue to engage, train and retain qualified teachers;

    our ability to compete effectively;

    our ability to successfully execute our growth strategies;

    our ability to develop and introduce new curriculum that meet our existing and target students' expectations, and adopt new technologies important to our business; and

    unexpected network interruptions or network failures.

        See "Risk Factors" and "Special Note Regarding Forward-Looking Statements" for a discussion of these and other risks and uncertainties associated with our business and investing in our ADSs.

Corporate Information

        Our principal executive offices are located at 6th Floor, Deshi Building North, Shangdi Street, Haidian District, Beijing 100085, PRC. Our telephone number at this address is +86-10-5692-8909. Our registered office in the Cayman Islands is located at the offices of International Corporation Services Ltd., Harbour Place 2nd Floor, 103 South Church Street, P.O. Box 472, George Town, Grand Cayman KY1-1106, Cayman Islands. Our agent for service of process in the United States is Law Debenture Corporate Services Inc., located at 400 Madison Avenue 4th Floor, New York, New York 10017.

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        Investors should contact us for any inquiries through the address and telephone number of our principal executive offices. Our website is www.51talk.com. The information contained on our website is not a part of this prospectus.

Corporate History and Structure

        We began our operations in July 2011 through Beijing Dasheng Zhixing Technology Co., Ltd., or Dasheng Zhixing, a PRC domestic company. 51Talk English Philippines Corporation, or Philippines Co I, was incorporated in August 2012 to conduct our business operations in the Philippines, including teacher sourcing, teacher engagement, teacher training, teacher quality control, course content development and free trial lessons.

        In order to facilitate international capital raising of our company, we incorporated China Online Education Group, or COE, to become our offshore holding company under the laws of the Cayman Islands in November 2012. In January 2013, China Online Education (HK) Limited, or COE HK Co I, was incorporated in Hong Kong as a wholly owned subsidiary of COE. Beijing Dasheng Online Technology Co., Ltd., or Dasheng Online, was set up in June 2013 as a wholly owned subsidiary of COE HK Co I in the PRC.

        Due to PRC legal restrictions on foreign ownership and investment in the value-added telecommunications market, we operate our online platform through Dasheng Zhixing, our consolidated variable interest entity, or VIE, in the PRC. Dasheng Zhixing holds our ICP license necessary to operate our online platform in China, our domain names, including 51talk.com, our registered trademarks in China and three of our registered software copyright that are essential to the Company's online operation in PRC. Dasheng Zhixing had 1,489 staff, including 278 employees and 1,211 personnel engaged by independent third party suppliers pursuant to services outsource agreements, or Outsourced Personnel, and leased seven office facilities as of March 31, 2016. We rely on a series of contractual arrangements among Dasheng Online, Dasheng Zhixing and its shareholders to operate our online and mobile platforms in China. We do not have equity interests in Dasheng Zhixing. However, as a result of these contractual arrangements, we are the primary beneficiary of Dasheng Zhixing and treat it as our consolidated VIE under U.S. GAAP.

        In October 2014, we undertook an internal reorganization, pursuant to which we established two new subsidiaries, namely 51Talk English International Limited, or COE HK Co II, in Hong Kong and China Online Innovations Inc., or Philippines Co II, in the Philippines. Since the reorganization, foreign teachers delivering paid lessons on our platform no longer entered into service agreements with Philippines Co I, but rather entered into service agreements with COE HK Co II. Furthermore, we transferred the bulk of our Philippine business operations from Philippines Co I to Philippines Co II, and we began to enter into employment agreements with new full-time employees in the Philippines using Philippines Co II. In January 2016, we established a new subsidiary in the Philippines, namely On Demand English Innovations Inc., or Philippines Co III. In April 2016, we transferred all business operations and most of the assets of Philippines Co I to Philippines Co III. After these internal reorganizations, Philippines Co III conducts our business operations relating to the free trial lessons delivered by our free trial teachers based in Baguio City, Philippines, and Philippines Co II conducts the remainder of our business operations in the Philippines, including teacher sourcing, teacher engagement, teacher training, teacher quality control, course content development and free trial lessons offered by our free trial teachers based in Manila, Philippines.

        Philippines Co I currently does not have any material business operation, and we intend to gradually liquidate Philippines Co I.

        Under the Philippine Corporation Code, the business, assets and affairs of a corporation is handled and managed by a board of directors, which is composed of the number of individuals mandated under the corporation's articles of incorporation. Philippines law further requires that each director own at least one

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share of stock in his or her name in the books of the corporation. In order to comply with the foregoing, there are seven individual shareholders of Philippines Co II and five individual shareholders of Philippines Co III holding an aggregate of 0.00014% and 0.004% of the equity interest of Philippines Co II and Philippines Co III, respectively. COE entered into contractual arrangements with each of (i) Philippines Co II and its seven individual shareholders and (ii) Philippines Co III and its five individual shareholders. These contractual arrangements provide us with an exclusive option to purchase all of the equity interests in Philippines Co II and Philippines Co III held by individual shareholders and the power to exercise their respective shareholder rights.

        In January 2015, we acquired and consolidated the business operations and assets of 91Waijiao, a provider of English education programs in China that focused on offering live lessons conducted by foreign teachers online. The following operating metrics of our company exclude the corresponding data of 91Waijiao for all periods presented in this prospectus, all of which have been immaterial to our overall business operation since our acquisition of the business operations and assets of 91Waijiao: (i) the number of paid lessons booked, (ii) the number of active students, (iii) the number of paying students and (iv) the number of teachers available.

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        The following diagram illustrates our current corporate structure:

GRAPHIC


Notes:

(1)
Each of Ting Shu, Christine Ang, Huiru Yuan, Jennifer Que, Samuel Celestino, Xing Liu and Wei Li holds 0.00002% of the equity interest in Philippines Co II. Each of Ting Shu, Christine Ang, Huiru Yuan, Jennifer Que and Samuel Celestino is a director of Philippines Co II. We entered into contractual arrangements with these individual shareholders which provide us with an exclusive option to purchase all of the individual shareholders' equity interests in Philippines Co II and the power to exercise their shareholder rights.

(2)
Each of Jimmy Lai, Frank Lin, Nelson Tan, Luzviminda Santos Castro and Alfonso Ang Po holds 0.0008% of the equity interest in Philippines Co III. Each of these individuals is a director of Philippines Co III. We entered into contractual arrangements with these individual shareholders which provide us with an exclusive option to purchase all of the individual shareholders' equity interests in Philippines Co III and the power to exercise their respective shareholder rights.

(3)
Jack Jiajia Huang holds 99.90% of the equity interest in Philippines Co I; Kei Hattori holds 0.02% of the equity interest in Philippines Co I; Nelson Tan holds 0.06% of the equity interest in Philippines Co I; and Frank Lin holds 0.02% of the equity interest in Philippines Co I. Each of Mr. Hattori, Mr. Tan and Mr. Lin is a director of Philippines Co I.

(4)
Jack Jiajia Huang holds 61.25% of the equity interest in Dasheng Zhixing; Ting Shu, our co-founder, director and senior vice president, holds 26.25% of the equity interest in Dasheng Zhixing; Ling Chen, an affiliate of an angel investor of our company, holds 12.50% of the equity interest in Dasheng Zhixing.

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Implications of Being an Emerging Growth Company

        As a company less than with US$1.0 billion in revenue for the last fiscal year, we qualify as an "emerging growth company" pursuant to the Jumpstart Our Business Startups Act of 2012 (as amended by the Fixing America's Surface Transportation Act of 2015), or the JOBS Act. An emerging growth company may take advantage of specified reduced reporting and other requirements that are otherwise applicable generally to public companies. These provisions include exemption from the auditor attestation requirement under Section 404 of the Sarbanes-Oxley Act of 2002, or Section 404, in the assessment of the emerging growth company's internal control over financial reporting. The JOBS Act also provides that an emerging growth company does not need to comply with any new or revised financial accounting standards until such date that a private company is otherwise required to comply with such new or revised accounting standards. However, we have elected to "opt out" of this provision and, as a result, we will comply with new or revised accounting standards as required when they are adopted for public companies. This decision to opt out of the extended transition period under the JOBS Act is irrevocable.

        We will remain an emerging growth company until the earliest of (i) the last day of our fiscal year during which we have total annual gross revenues of at least US$1.0 billion; (ii) the last day of our fiscal year following the fifth anniversary of the completion of this offering; (iii) the date on which we have, during the previous three year period, issued more than US$1.0 billion in non-convertible debt; or (iv) the date on which we are deemed to be a "large accelerated filer" under the Securities Exchange Act of 1934, as amended, or the Exchange Act, which would occur if the market value of our ADSs that are held by non-affiliates exceeds US$700 million as of the last business day of our most recently completed second fiscal quarter. Once we cease to be an emerging growth company, we will not be entitled to the exemptions provided in the JOBS Act discussed above.

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Conventions Which Apply to this Prospectus

        Unless we indicate otherwise, all information in this prospectus reflects the following:

    no exercise by the underwriters of their over-allotment option to purchase up to            additional ADSs representing             shares from us; and

        Except where the context otherwise requires and for purposes of this prospectus only:

    a lesson is considered "booked" when it is taken or when the student to such lesson is confirmed absent;

    an "active student" for a specified period refers to a student who booked at least one paid lesson;

    "ADSs" refer to our American depositary shares, each represents            ordinary shares;

    "China" or "PRC" refer to the People's Republic of China, excluding, for the purpose of this prospectus only, Taiwan, Hong Kong and Macau;

    "gross billings" for a specific period refer to the total amount of cash received for the sale of course packages in such period, net of the total amount of refunds in such period;

    a "new paying student" for a specified period refers to a paying student during the period that had not purchased a course package in any prior period;

    "ordinary shares" refer to the ordinary shares of China Online Education Group, par value US$0.0001 per share;

    a "paying student" for a specified period refers to a student that purchased a course package during the period, and the total number of "paying students" for a specified period refers to the total number of paying students for such period minus the total number of students that obtained refunds during such period;

    "preferred shares" refer collectively to series A, series B, series C and series D convertible and redeemable preferred shares of China Online Education Group, par value US$0.0001 per share;

    "RMB" or "Renminbi" refers to the legal currency of China;

    "US$," "dollars" or "U.S. dollars" refers to the legal currency of the United States; and

    "we," "us," "our company," "our," and "COE" refer to China Online Education Group, a Cayman Islands company, and its subsidiaries, and, in the context of describing our operations and consolidated financial information, also include its consolidated variable interest entities.

        This prospectus contains information and statistics relating to China's economy and the industries in which we operate derived from various publications issued by market research companies and PRC governmental entities, which have not been independently verified by us, the underwriters or any of their respective affiliates or advisers. The information in such sources may not be consistent with other information compiled in or outside China.

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The Offering

Offering price

  We currently estimate that the initial public offering price will be between US$        and US$        per ADS.

ADSs offered by us

 

        ADSs (or        ADSs if the underwriters exercise their over-allotment option in full)

Ordinary shares outstanding immediately after this offering

 

        ordinary shares (or        ordinary shares if the underwriters exercise their over-allotment option in full) will be outstanding, par value US$0.0001 per share.

ADSs outstanding immediately after this offering

 

        ADSs (or        ADSs if the underwriters exercise their over-allotment option in full)

The ADSs

 

Each ADS represents        ordinary shares, par value US$0.0001 per share. The depositary will hold the ordinary shares underlying your ADSs. You will have rights as provided in the deposit agreement.

 

We do not expect to pay dividends in the foreseeable future. If, however, we declare dividends on our ordinary shares, the depositary will pay you the cash dividends and other distributions it receives on our ordinary shares, after deducting its fees and expenses in accordance with the terms set forth in the deposit agreement.

 

You may turn in your ADSs to the depositary in exchange for ordinary shares. The depositary will charge you fees for any exchange.

 

We may amend or terminate the deposit agreement without your consent. If you continue to hold your ADSs after an amendment to the deposit agreement, you agree to be bound by the deposit agreement as amended.

 

To better understand the terms of the ADSs, you should carefully read the "Description of American Depositary Shares" section of this prospectus. You should also read the deposit agreement, which is filed as an exhibit to the registration statement that includes this prospectus.

Over-allotment option

 

We have granted to the underwriters an option, which is exercisable within 30 days from the date of this prospectus, to purchase up to an aggregate of        additional ADSs.

Use of proceeds

 

We expect to receive net proceeds of approximately US$        million from this offering, assuming an initial public offering price of US$        per ADS, which is the midpoint of the estimated range of the initial public offering price, after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

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The primary purposes of this offering are to create a public market for our shares for the benefit of all shareholders, retain talented employees by providing them with equity incentives and obtain additional capital. We plan to use the net proceeds of this offering primarily for general corporate purposes, which may include investing in sales and marketing activities, course development, technology infrastructure, capital expenditures and other general and administrative matters. We may also use a portion of the net proceeds for investing in, or acquiring, complementary businesses, although we have not identified any near-term investment or acquisition targets. See "Use of Proceeds" for additional information.

Lock-up

 

[We, our directors and executive officers, our existing shareholders and certain of our option holders have agreed with the underwriters, subject to certain exceptions, not to sell, transfer or dispose of, directly or indirectly, any of our ADSs or ordinary shares or securities convertible into or exercisable or exchangeable for our ADSs or ordinary shares for a period of 180 days after the date of this prospectus.] See "Shares Eligible for Future Sale" and "Underwriting" for more information.

Listing

 

We intend to apply to have the ADSs listed on the [NYSE/NASDAQ Global Market] under the symbol "       ." Our ADSs and ordinary shares will not be listed on any other stock exchange or traded on any automated quotation system.

Payment and settlement

 

The underwriters expect to deliver the ADSs against payment therefor through the facilities of the Depository Trust Company on            , 2016.

Depositary

   

[Directed share program

 

At our request, the underwriters have reserved for sale, at the initial public offering price, up to an aggregate of        ADSs offered in this offering to our directors, officers, employees, business associates and related persons.]

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Our Summary Consolidated Financial Data and Operating Data

        The following summary consolidated statements of comprehensive loss data for the years ended December 31, 2013, 2014 and 2015, summary consolidated balance sheet data as of December 31, 2013, 2014 and 2015 and summary consolidated cash flow data for the years ended December 31, 2013, 2014 and 2015 have been derived from our audited consolidated financial statements included elsewhere in this prospectus. The following summary consolidated statements of comprehensive loss for the three months ended March 31, 2015 and 2016, summary consolidated balance sheet data as of March 31, 2016 and summary consolidated cash flow data for the three months ended March 31, 2015 and 2016 have been derived from our unaudited interim condensed consolidated financial statements included elsewhere in this prospectus and have been prepared on the same basis as our audited consolidated financial statements and include all adjustments, consisting only of normal and recurring adjustments, that we consider necessary for a fair presentation of our financial position and operating results for the periods presented. Our historical results are not necessarily indicative of results expected for future periods. You should read this Summary Consolidated Financial Data section together with our consolidated financial statements and the related notes and "Management's Discussion and Analysis of Financial Condition and Results of Operations" included elsewhere in this prospectus.

 
  For the Year Ended December 31,   For the Three Months Ended March 31,  
 
  2013   2014   2015   2015   2016  
 
  RMB   RMB   RMB   US$   RMB   RMB   US$  
 
  (in thousands, except for share, per share and per ADS data)
 

Summary Consolidated Statements of Comprehensive Loss:

                                           

Net revenues

    21,665     52,210     154,675     23,878     24,374     72,191     11,196  

Cost of revenues

    (9,302 )   (22,214 )   (59,668 )   (9,211 )   (9,816 )   (26,308 )   (4,080 )

Gross profit

    12,363     29,996     95,007     14,667     14,558     45,883     7,116  

Operating expenses:

                                           

Sales and marketing

    (17,124 )   (81,269 )   (297,337 )   (45,901 )   (49,050 )   (94,245 )   (14,616 )

Product development

    (3,018 )   (10,781 )   (54,597 )   (8,428 )   (7,153 )   (26,542 )   (4,116 )

General and administrative

    (8,597 )   (31,553 )   (64,903 )   (10,019 )   (9,337 )   (25,658 )   (3,979 )

Total operating expenses

    (28,739 )   (123,603 )   (416,837 )   (64,348 )   (65,540 )   (146,445 )   (22,711 )

Loss from operations

    (16,376 )   (93,607 )   (321,830 )   (49,681 )   (50,982 )   (100,562 )   (15,595 )

Interest and other (expense)/income, net

    (710 )   (1,213 )   (353 )   (54 )   (322 )   1,666     258  

Loss before income tax expenses

    (17,086 )   (94,820 )   (322,183 )   (49,735 )   (51,304 )   (98,896 )   (15,337 )

Income tax expenses

    (710 )   (6,882 )   (4,903 )   (757 )   (2,399 )   (362 )   (56 )

Net loss

    (17,796 )   (101,702 )   (327,086 )   (50,492 )   (53,703 )   (99,258 )   (15,393 )

Accretions to preferred shares redemption value

    (322 )   (23,020 )   (75,665 )   (11,681 )   (11,368 )   (49,815 )   (7,726 )

Deemed dividends at re-designation of ordinary shares to preferred shares

    (2,309 )   (5,665 )                    

Net loss attributable to ordinary shareholders

    (20,427 )   (130,387 )   (402,751 )   (62,173 )   (65,071 )   (149,073 )   (23,119 )

Net loss

    (17,796 )   (101,702 )   (327,086 )   (50,492 )   (53,703 )   (99,258 )   (15,393 )

Other comprehensive (loss)/income:

                                           

Foreign currency translation adjustments

    (571 )   2,308     3,014     465     (94 )   581     90  

Total comprehensive loss

    (18,367 )   (99,394 )   (324,072 )   (50,027 )   (53,797 )   (98,677 )   (15,303 )

Weighted average number of ordinary shares used in computing basic and diluted loss per share

    84,660,041     76,308,165     72,267,532     72,267,532     72,267,532     72,267,532     72,267,532  

Net loss per share attributable to ordinary shareholders

    (0.24 )   (1.71 )   (5.57 )   (0.86 )   (0.90 )   (2.06 )   (0.32 )

Loss per ADS(1)

                                           

Basic

                                           

Diluted

                                           

Non-GAAP Financial Measure(2)

   
 
   
 
   
 
   
 
   
 
   
 
   
 
 

Gross billings

    36,097     116,921     353,277     54,537     53,302     154,770     24,003  

Notes:

(1)
Each ADS represents                ordinary shares.

(2)
For discussions of gross billings and reconciliation of gross billings to net revenues, see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measure."

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        The following table presents our summary consolidated balance sheet data as of December 31, 2013, 2014 and 2015 and March 31, 2016.

 
  As of December 31,   As of March 31, 2016  
 
  2013   2014   2015    
   
   
   
 
 
   
   
  RMB
Pro forma(1)
  US$
Pro forma(1)
 
 
  RMB   RMB   RMB   US$   RMB   US$  
 
  (in thousands)
 

Summary Consolidated Balance Sheet Data:

                                                 

Cash and cash equivalents

    61,502     209,774     46,873     7,236     76,873     11,922     76,873     11,922  

Total assets

    63,496     227,067     291,550     45,008     278,897     43,253     278,897     43,253  

Deferred revenues

    16,479     78,416     272,176     42,017     348,136     53,991     348,136     53,991  

Accrued expenses and other current liabilities

    5,861     25,155     84,323     13,017     92,120     14,287     92,120     14,287  

Total liabilities

    24,162     115,813     377,867     58,333     463,503     71,883     463,503     71,883  

Total mezzanine equity

    65,531     277,723     478,962     73,939     528,777     82,007          

Total shareholders' deficit

    (26,197 )   (166,469 )   (565,279 )   (87,264 )   (713,383 )   (110,637 )   (184,606 )   (28,630 )

Notes:

(1)
All of the preferred shares will automatically convert into ordinary shares at the applicable conversion price upon closing of a qualified initial public offering. The unaudited pro forma balance sheet information as of March 31, 2016 assumes the automatic conversion of all of the outstanding preferred shares into ordinary shares on a one-to-one basis, as if conversion had occurred as of March 31, 2016.

        The following table presents our summary consolidated cash flow data for the years ended December 31, 2013, 2014 and 2015, as well as the three months ended March 31, 2015 and 2016.

 
  For the Year Ended December 31,   For the Three Months
Ended March 31,
 
 
  2013   2014   2015   2015   2016  
 
  RMB   RMB   RMB   US$   RMB   RMB   US$  
 
  (in thousands)
 

Summary Consolidated Cash Flow Data:

                                           

Net cash provided by/(used in) operating activities

    1,956     (15,461 )   (104,020 )   (16,058 )   (13,351 )   (3,719 )   (577 )

Net cash (used in)/provided by investing activities

    (386 )   (7,814 )   (192,884 )   (29,776 )   (6,520 )   34,585     5,364  

Net cash provided by financing activities

    59,273     169,724     125,574     19,385              

Effect of exchange rate changes on cash and cash equivalents

    (565 )   1,823     8,429     1,301     82     (866 )   (134 )

Net increase/(decrease) in cash and cash equivalents

    60,278     148,272     (162,901 )   (25,148 )   (19,789 )   30,000     4,653  

Cash and cash equivalents at beginning of the period

    1,224     61,502     209,774     32,384     209,774     46,873     7,269  

Cash and cash equivalents at end of the period

    61,502     209,774     46,873     7,236     189,985     76,873     11,922  

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Summary Operating Data

        The following table presents summary operating data for the periods indicated:

 
  For the Year Ended
December 31,
  For the Three
Months Ended
March 31,
 
 
  2013   2014   2015   2015   2016  

Summary Operating Data:

                               

Active students(1) (in thousands)

    15.2     35.0     86.5     32.4     71.9  

Paying students(2) (in thousands)

    13.9     28.8     68.5     13.2     26.4  

Average spending per paying student (in RMB thousands)

    2.6     4.1     5.2     4.0     5.9  

Notes:

(1)
an "active student" for a specific period refers to a student who booked at least one paid lesson. A lesson is considered "booked" when it is taken or when the student to such lesson is confirmed absent.

(2)
a "paying student" for a specified period refers to a student that purchased a course package, either prepaid credit or prepaid membership, during the period, and the total number of "paying students" for a specified period refers to the total number of paying students for such period minus the total number of students that obtained refunds during such period.

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RISK FACTORS

        An investment in our ADSs involves significant risks. You should carefully consider all of the information in this prospectus, including the risks and uncertainties described below, before making an investment in our ADSs. Any of the following risks could have a material adverse effect on our business, financial condition and results of operations. In any such case, the market price of our ADSs could decline, and you may lose all or part of your investment.

Risks Related to Our Business and Industry

We have a limited operating history with our current business model, which makes it difficult to predict our future prospects and financial performance.

        We have a short operating history with our current business model. Our operations since inception have generated limited gross billings and revenues, and may not produce significant gross billings and revenues in the near term, or at all, which may harm our ability to obtain additional financing and may require us to reduce or discontinue our operations. If we do generate significant gross billings and revenues in the future, we expect it will be largely from the sale of our English course packages on our online and mobile education platforms, which are in an immature industry. You must consider our business and prospects in light of the risks and difficulties we may encounter as an early-stage operating company in a new and rapidly evolving industry. We may not be able to successfully address these risks and difficulties, which could significantly harm our business, operating results and financial condition.

If we are not able to continue to attract students to purchase our course packages and to increase the spending of our students on our platform, our business and prospects will be materially and adversely affected.

        Our ability to continue to attract students to purchase our course packages, as well as our ability to persuade students to increase their spending on our education platform, are critical to the continued success and growth of our business. This in turn will depend on several factors, including our ability to effectively market our platform to a broader base of prospective students, continue to develop, adapt or enhance quality educational content and services to meet the evolving demands of our existing or prospective students and expand our geographic reach. We must also manage our growth while maintaining consistent and high teaching quality, and respond effectively to competitive pressures. If we are unable to continue to attract students to purchase our course packages and to increase the spending of our students on our platform, our gross billings and net revenues may decline, which may have a material adverse effect on our business, financial condition and results of operations.

Our business depends on the market recognition of our brand, and if we are unable to maintain and enhance our brand recognition, our business, financial conditions and results of operations may be materially and adversely affected.

        We believe that the market recognition of our 51Talk brand has significantly contributed to the success of our business and that maintaining and enhancing the reputation of our brand is critical to sustaining our competitive advantages. Our ability to maintain and enhance our brand recognition and reputation depends primarily on the perceived effectiveness and quality of our curriculum and teachers, as well as the success of our branding efforts. In 2015 we engaged Ms. Li Na, a well-known Chinese tennis player, to be our brand ambassador. Our branding efforts however may not be successful or may inadvertently impact our brand recognition and reputation negatively. If we are unable to maintain and further enhance our brand recognition and reputation and promote awareness of our platform, we may not be able to maintain our current level of student base, fees and engage qualified teachers, and our results of operations may be materially and adversely affected. Furthermore, any negative publicity relating to our company, our courses, teachers and platform or our brand ambassador, regardless of its veracity, could harm our brand image and in turn materially and adversely affect our business and results of operations.

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If we are unable to conduct our sales and marketing activities cost-effectively, our results of operations and financial condition may be materially and adversely affected.

        We have incurred significant sales and marketing expenses. Our sales expenses include telemarketing sales and free trial lesson related expenses, and marketing expenses include online and mobile marketing and branding expenses. The number of our sales and marketing staff increased from 138 as of December 31, 2013 to 736 as of December 31, 2014, and further to 1,837 as of December 31, 2015, and further to 1,936 (including 731 full-time employees and 1,205 Outsourced Personnel) as of March 31, 2016. We incurred a total of RMB17.1 million, RMB81.3 million, RMB297.3 million (US$45.9 million) and RMB94.2 million (US$14.6 million) of sales and marketing expenses in 2013, 2014, 2015 and in the three months ended March 31, 2016, respectively. In December 2015, we began outsourcing part of our marketing and sales functions to independent third party suppliers who provide management and business outsourcing services to us. As of March 31, 2016, 714 of our previous employees had terminated their employment with us and established employment relationships with the third party suppliers that provide outsourcing services to us.

        Our sales activities may not be well received by students and may not result in the levels of sales that we anticipate and our trial lessons may not be attractive to our prospective students. Furthermore, we may not be able to achieve the operational efficiency necessary to increase the gross billings per sales and marketing staff. We also may not be able to retain or recruit experienced sales staff, or to efficiently train junior sales staff. Further, marketing and branding approaches and tools in the online education market in China are evolving, especially for mobile platforms. This further requires us to enhance our marketing and branding approaches and experiment with new methods to keep pace with industry developments and student preferences. Failure to refine our existing marketing and branding approaches or to introduce new marketing and branding approaches in a cost-effective manner could reduce our market share, cause our revenues to decline and negatively impact our profitability.

We have incurred, and in the future may continue to incur, net losses.

        We have incurred net losses since our inception. We experienced net losses of RMB17.8 million, RMB101.7 million and RMB327.1 million (US$50.5 million) in 2013, 2014 and 2015, respectively. For the three months ended March 31, 2016, we had a net loss of RMB99.3 million (US$15.4 million), compared to a net loss of RMB53.7 million for the three months ended March 31, 2015. We had accumulated deficit of RMB25.6 million, RMB168.1 million, RMB570.0 million (US$88.0 million) and RMB718.6 million (US$111.5 million) as of December 31, 2013, 2014 and 2015 and March 31, 2016, respectively.

        We cannot assure you that we will be able to generate net profits or positive cash flow from operating activities in the future. Our ability to achieve profitability will depend in large part on our ability to increase our operating margin, either by growing our revenues at a rate faster than our operating expenses increase, or by reducing our operating expenses, especially our sales and market expenses, as a percentage of our net revenues. Accordingly, we intend to continue to invest in our branding and marketing activities to attract new students, improve our online and mobile platforms and data analytics capabilities to enhance student experience. As a result of the foregoing, we believe that we may incur net losses for some time in the future.

If we are not able to continue to engage, train and retain qualified teachers, we may not be able to maintain consistent teaching quality on our platform, and our business, financial conditions and operating results may be materially and adversely affected.

        Our teachers are critical to the learning experience of our students and our reputation. We seek to engage highly qualified teachers with strong English and teaching skills. We must provide competitive pay and other benefits, such as flexibility in lesson scheduling to attract and retain them. We must also provide ongoing training to our teachers to ensure that they stay abreast of changes in course materials, student demands and other changes and trends necessary to teach effectively. Furthermore, as we continue to develop new course contents and lesson formats, we may need to engage additional teachers with

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appropriate skill sets or backgrounds to deliver instructions effectively. We cannot guarantee that we will be able to effectively engage and train such teachers quickly, or at all. Further, given other potential more attractive opportunities for our quality teachers, over time some of them may choose to leave our platform. For teachers who advanced to a rating of between three and five stars in the first quarter of 2015, approximately 63% of them were still with us and opened teaching slots on our platform in the first quarter of 2016. We have not experienced major difficulties in engaging, training or retaining qualified teachers in the past, however, we may not always be able to engage, train and retain enough qualified teachers to keep pace with our growth while maintaining consistent education quality. We may also face significant competition in engaging qualified teachers from our competitors or from other opportunities that are perceived as more desirable. A shortage of qualified teachers, a decrease in the quality of our teachers' performance, whether actual or perceived, or a significant increase in the cost to engage or retain qualified teachers would have a material adverse effect on our business and financial conditions and results of operations.

We face significant competition, and if we fail to compete effectively, we may lose our market share or fail to gain additional market share, which would adversely impact our business and financial conditions and operating results.

        The English education market in China is fragmented, rapidly evolving and highly competitive. We face competition in general English proficiency education, as well as in K-12, test preparation and other specialized areas of English education, from existing online and offline education companies. In the future, we may also face competition from new entrants into the English education market.

        Some of our competitors may be able to devote more resources than we can to the development, promotion and provision of their education programs and respond more quickly than we can to changes in student demands, market trends or new technologies. In addition, some of our competitors may be able to respond more quickly to changes in student preferences or engage in price-cutting strategies. We cannot assure you that we will be able to compete successfully against current or future competitors. If we are unable to maintain our competitive position or otherwise respond to competitive pressure effectively, we may lose market share or be forced to reduce our fees for our course packages, either of which would adversely impact our profitability.

If we fail to successfully execute our growth strategies, our business and prospects may be materially and adversely affected.

        Our growth strategies include further enhancing our brand image to grow our student base and increase student enrollments, increasing our market penetration amongst K-12 students, expanding our course offerings, enhancing our teaching methods, improving the learning experience of our students, and advancing our technology. We may not succeed in executing these growth strategies due to a number of factors, including the following:

    we may not be able to replicate the success and growth of our adult English program to the K-12 English education market;

    we may fail to further promote our platforms;

    we may not be successful in effectively delivering and promoting our group lessons with Chinese tutors;

    we may fail in our efforts to effectively promote our corporate packages;

    we may not be able to engage, train and retain a sufficient number of qualified teachers and other key personnel;

    we may not be able to continue to improve our personalized learning experience of our students and to enhance our existing courses or develop new courses, especially for K-12 students, that meet the changing demands for English learners;

    we may fail to maintain the technology necessary to deliver a smooth learning experience to our students; and

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    we may not be able to identify suitable targets for acquisitions and partnership.

        If we fail to successfully execute our growth strategies, we may not be able to maintain our growth rate and our business and prospects may be materially and adversely affected as a result.

If we fail to develop and introduce new courses that meet our existing and target students' expectations, or adopt new technologies important to our business, our competitive position and ability to generate revenues may be materially and adversely affected.

        Historically, our core business centered on English education to adults with our Classic English course. We have since expanded our course offerings to target K-12 students, as well as a broader range of situation-based English education and test preparation targeting a wide range of student demographics. In addition to one-on-one lessons with Filipino teachers, we have also introduced lessons with Western teachers and Chinese tutors to provide our students a broader selection of teachers and course formats. We intend to continue developing new courses. The timing of the introduction of new courses is subject to risks and uncertainties. Unexpected technical, operational, logistical or other problems could delay or prevent the introduction of one or more new courses. Moreover, we cannot assure you that any of these courses or programs will match the quality or popularity of those developed by our competitors, achieve widespread market acceptance or contribute the desired level of income.

        The effectiveness of our program depends on the success of our personalized learning approach to English education, which in turn is determined by the efficiency of our data analytics know-how. We might not be able to continue to efficiently monitor and analyze relevant data important for us to provide a personalized learning experience for our students, or to continue to drive our teaching training, curriculum development and other operational aspects of our platform.

        Technology standards in internet and value-added telecommunications services and products in general, and in online education in particular, may change over time. If we fail to anticipate and adapt to technological changes, our market share and our business development could suffer, which in turn could have a material and adverse effect on our financial condition and results of operations. If we are unsuccessful in addressing any of the risks related to new courses, our reputation and business may be materially and adversely affected.

Unexpected network interruptions, security breaches or computer virus attacks and system failures could have a material adverse effect on our business, financial condition and results of operations.

        Our business depends on the performance and reliability of the internet infrastructure in China and the Philippines. In China, almost all access to the internet is maintained through state-controlled telecommunications operators. In many parts of China and the Philippines, the internet infrastructure is relatively underdeveloped, and internet connections are generally slower and less stable than in more developed countries. We cannot assure you that the internet infrastructure in China and the Philippines will remain sufficiently reliable for our needs or that either country will ever develop and make available more reliable internet access to our students and teacher. Any failure to maintain the performance, reliability, security or availability of our network infrastructure may cause significant damage to our ability to attract and retain students and teachers. Major risks involving our network infrastructure include:

    breakdowns or system failures resulting in a prolonged shutdown of our servers;

    disruption or failure in the national backbone networks in China or the Philippines, which would make it impossible for students and teachers to access our online and mobile platforms or to engage in live lessons;

    damage from natural disaster or other catastrophic event such as an typhoon, volcanic eruption, earthquake, flood, telecommunications failure, or other similar events in China or in the Philippines; and

    any infection by or spread of computer viruses.

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        Any network interruption or inadequacy that causes interruptions in the availability of our online and mobile platforms or deterioration in the quality of access to our online and mobile platforms could reduce student satisfaction and result in a reduction in the activity level of our students and the number of students purchasing our course packages. For example, in November 2013, the internet infrastructure in the Philippines was significantly disrupted by typhoons. During that period, a significant number of our teachers in the Philippines were not able to access our platform and deliver paid lessons. If sustained or repeated, these performance issues could reduce the attractiveness of our platform. Furthermore, increases in the volume of traffic on our online and mobile platforms could strain the capacity of our existing computer systems and bandwidth, which could lead to slower response times or system failures. The internet infrastructure in China and in the Philippines may not support the demands associated with continued growth in internet usage. This would cause a disruption or suspension in our lesson delivery, which could hurt our brand and reputation. We may need to incur additional costs to upgrade our technology infrastructure and computer systems in order to accommodate increased demand if we anticipate that our systems cannot handle higher volumes of traffic in the future.

        All of our servers and routers, including backup servers, are currently hosted by third-party service providers in multiple cities in China. We do not maintain any backup servers outside of these cities. We also rely on major telecommunication companies to provide us with data communications capacity primarily through local telecommunications lines and internet data centers to host our servers. We may not have access to alternative services and we have no control over the costs of services. If the prices that we pay for telecommunications and internet services in China and the Philippines rise significantly, our gross profit and net income could be adversely affected. In addition, if internet access fees or other charges to internet users increase, our visitor traffic may decrease, which in turn may harm our revenues.

We use the streaming technology and infrastructure of YY to deliver lessons to our students and to conduct teacher training. Any interruption to or discontinuation of our cooperative relationship with YY may severely and negatively impact our ability to deliver our course content to students.

        We use the technology of YY, to deliver audio and video data, and their technology is important to our ongoing ability to operate our online and mobile education platforms. In June 2014, we entered into a five-year technology service agreement with Guangzhou Huaduo Network Technology Company Limited, or Guangzhou Huaduo, an affiliated entity of YY, which was amended in December 2015. This agreement provides us with the right to use the audio and video streaming technology and infrastructure from YY. YY also provides technology support and services to us pursuant to this agreement. In February 2016, we entered into a four-year license agreement with Shanghai Zhaoyan Network Technology Company Limited, or Shanghai Zhaoyan, as an additional service provider for audio and video data delivery and to enhance the compatibility of our platforms on Mac.

        Licensed technology and intellectual property rights from third parties, including YY, may not continue to be available on commercially reasonable terms, or at all. Our agreement with Guangzhou Huaduo is terminable and provide limited recourse for service interruptions. Any loss of the right to use any of this technology could result in delays in delivering our lessons or to conduct teacher training until equivalent technology is identified and integrated, which could harm our business. Any interruption to or discontinuation of our cooperative relationship with YY, despite our current attempts to integrate the technology of Shanghai Zhaoyan and our in-house technology development efforts, may severely and adversely impact our ability to deliver our lessons to students. In this situation we would be required to either redesign our solutions to function with technology available from other parties or to develop these components ourselves more quickly, which would result in increased costs or interruption of our platform, which could harm our students' learning experience and our reputation. If we fail to maintain or renegotiate any of these technology or intellectual property licenses, we could face significant delays and the diversion of resources in attempting to develop similar or replacement technology, or to license and integrate a functional equivalent of the technology we use from YY.

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Higher labor costs, inflation and implementation of stricter labor laws in the PRC or in the Philippines may adversely affect our business, financial conditions and results of operations.

        Labor costs in China have increased with China's economic development, particularly in the large cities where our offices are based. Rising inflation in China is also putting pressure on wages and the average wage level for our employees has also increased in recent years. In addition, we are required by PRC laws and regulations to pay various statutory employee benefits, including pensions, housing funds, medical insurance, work-related injury insurance, unemployment insurance and maternity insurance to designated governmental agencies for the benefit of our employees. We expect that our labor costs, including wages and employee benefits, will continue to increase. Unless we are able to pass on these increased labor costs to our students by increasing prices for our courses or improving the utilization of our staff, our profitability and results of operations may be materially and adversely affected. Furthermore, the PRC government has promulgated new laws and regulations to enhance labor protections in recent years, such as the Labor Contract Law and the Social Insurance Law. As the interpretation and implementation of these new laws and regulations are still evolving, our employment practice may not at all times be deemed in compliance with the new laws and regulations. For instance, we began outsourcing part of our marketing and sales functions to independent third party suppliers who provide management and business outsourcing services to us in December 2015. There remains a degree of uncertainty as to whether this service outsourcing arrangement will be deemed a labor dispatch arrangement under current PRC laws and regulations. If the authorities take the view that this outsourcing arrangement constitutes labor dispatch and thus violates relevant labor laws, we may be ordered to terminate this outsource arrangement and may even be fined or have our business license revoked if the relevant authorities deem such arrangement constitutes a serious violation of the PRC laws and regulations. If we are subject to penalties or incur significant liabilities in connection with labor disputes or investigation, our business and profitability may be adversely affected.

        In addition, our future success depends, to a significant extent, on our ability to engage, train and retain qualified personnel in the Philippines, particularly experienced teachers with expertise in English education. Our experienced mid-level managers in the Philippines are instrumental in implementing our business strategies, executing our business plans and supporting our business operations and growth. We benefit from lower labor costs in the Philippines, but the Philippines is subject to a relatively high degrees of political and social instability. Disruptions resulting from this instability could decrease our efficiency and increase our costs. Any political or economic instability in the Philippines could result in our having to replace or reduce these labor sources, which may increase our labor costs and have an adverse impact on our results of operations.

        We engage our teachers in the Philippines as independent contractors, whose rights are different from those of employees. Under Philippine labor laws, the level and extent of control exercised by the hiring entity would determine the employment status. Our labor costs will increase if we engage our teachers in the Philippines as full-time employees or if courts or relevant authorities in the Philippines determine that our teachers are deemed employees.

        We also rely on a third-party vendor in Hong Kong to handle the payment of the compensation of our teachers in the Philippines. Any failure of this vendor to provide these services may negatively impact our relationships with teachers in the Philippines, damage our reputation and cause us to lose teachers while making it difficult to find replacement teachers.

Some students may decide not to continue taking our courses for a number of reasons, including a perceived lack of improvement in their English proficiency or general dissatisfaction with our programs, which may adversely affect our business, financial condition, results of operations and reputation.

        The success of our business depends in large part on our ability to retain our students by delivering a satisfactory learning experience and improving their English proficiency. If students feel that we are not providing them the experience they are seeking, they may choose not to renew their existing packages. For example, our education programs may fail to significantly improve a student's English proficiency. There

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are no standard assessments or tests to measure the effectiveness of our lessons or teaching methods, and our ability to improve the English proficiency of our students is largely dependent upon the interests, efforts and time commitment of each student. Student and, for K-12 students, parent satisfaction with our programs may decline for a number of reasons, many of which may not reflect the effectiveness of our lessons and teaching methods. A student's learning experience may also suffer if his or her relationship with our teachers and teaching assistants does not meet expectations. We have observed an increase in forfeiture rate historically, which may negatively impact the perceived effectiveness of our curriculum and the level of student engagement on our platform. The active rates of our new paying students have generally been increasing compared to our earlier students. See "Business—Our Strengths—Rapidly-increasing student base and engagement." However, if a significant number of students fail to significantly improve their English proficiency after taking our lessons or if their learning experiences with us are unsatisfactory, they may not purchase additional lessons from us or refer other students to us and our business, financial condition, results of operations and reputation would be adversely affected.

Our failure to protect our intellectual property rights may undermine our competitive position, and litigation to protect our intellectual property rights or defend against third party allegations of infringement may be costly and ineffective.

        We believe that our copyrights, trademarks and other intellectual property are essential to our success. We depend to a large extent on our ability to develop and maintain the intellectual property rights relating to our technology and course materials. We have devoted considerable time and energy to the development and improvement of our websites, mobile apps, our Air Class platform and our course materials.

        We rely primarily on copyrights, trademarks, trade secrets and other contractual restrictions for the protection of the intellectual property used in our business. Nevertheless, these provide only limited protection and the actions we take to protect our intellectual property rights may not be adequate. Our trade secrets may become known or be independently discovered by our competitors. Third parties may in the future pirate our course materials and may infringe upon or misappropriate our other intellectual property. Infringement upon or the misappropriation of, our proprietary technologies or other intellectual property could have a material adverse effect on our business, financial condition or operating results. Policing the unauthorized use of proprietary technology can be difficult and expensive.

        Also, litigation may be necessary to enforce our intellectual property rights, protect our trade secrets or determine the validity and scope of the proprietary rights of others. Such litigation may be costly and divert management's attention away from our business. An adverse determination in any such litigation would impair our intellectual property rights and may harm our business, prospects and reputation. Enforcement of judgments in China is uncertain, and even if we are successful in litigation, it may not provide us with an effective remedy. In addition, we have no insurance coverage against litigation costs and would have to bear all costs arising from such litigation to the extent we are unable to recover them from other parties. The occurrence of any of the foregoing could have a material adverse effect on our business, financial condition and results of operations.

We may encounter disputes from time to time relating to our use of intellectual property of third parties.

        We cannot be certain that third parties will not claim that our business infringes upon or otherwise violates patents, copyrights or other intellectual property rights that they hold. We cannot assure you that third parties will not claim that our courses and marketing materials, online courses, products, and platform or other intellectual property developed or used by us infringe upon valid copyrights or other intellectual property rights that they hold. We may be subject to claims by educational institutions and organizations, content providers and publishers, competitors and others on the grounds of intellectual property rights infringement, defamation, negligence or other legal theories based on the content of the materials that we or our teachers distribute or use in our business operation. These types of claims have been brought, sometimes successfully, against print publications and educational institutions in the past. We may encounter disputes from time to time over rights and obligations concerning intellectual property,

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and we may not prevail in those disputes. As of the date of this prospectus, we have not been able to register one of our Chinese trade-names, WuYouYingYu ( GRAPHIC ), as a trademark in the PRC for our business category.

        Any claims against us, with or without merit, could be time consuming and costly to defend or litigate, divert our management's attention and resources or result in the loss of goodwill associated with our brand. If a lawsuit against us is successful, we may be required to pay substantial damages and/or enter into royalty or license agreements that may not be based upon commercially reasonable terms, or we may be unable to enter into such agreements at all. We may also lose, or be limited in, the rights to offer some of our programs, parts of our platform and products or be required to make changes to our course materials or websites. As a result, the scope of our course materials could be reduced, which could adversely affect the effectiveness of our curriculum, limit our ability to attract new students, harm our reputation and have a material adverse effect on our results of operations and financial position.

Failure to protect confidential information of our teachers and students against security breaches could damage our reputation and brand and substantially harm our business and results of operations.

        A significant challenge to the online education industry is the secure storage of confidential information and its secure transmission over public networks. Other than purchases made by our corporate partners, all purchases of our course packages are made through our website and our mobile apps. In addition, online payments for our course packages are settled through third-party online payment services. Maintaining complete security for the storage and transmission of confidential information on our technology platform, such as student names, personal information and billing addresses, is essential to maintaining student confidence.

        We have adopted security policies and measures to protect our proprietary data and student information. However, advances in technology, the expertise of hackers, new discoveries in the field of cryptography or other events or developments could result in a compromise or breach of the technology that we use to protect confidential information. We may not be able to prevent third parties, especially hackers or other individuals or entities engaging in similar activities, from illegally obtaining such confidential or private information we hold as a result of our students' visits to our website and use of our mobile apps. Such individuals or entities obtaining our students' confidential or private information may further engage in various other illegal activities using such information. Any negative publicity on our website's or mobile apps' safety or privacy protection mechanisms and policies, and any claims asserted against us or fines imposed upon us as a result of actual or perceived failures, could have a material and adverse effect on our public image, reputation, financial condition and results of operations.

        Practices regarding the collection, use, storage, transmission and security of personal information by companies operating over the internet and mobile platforms have recently come under increased public scrutiny. Increased regulation by the PRC government of data privacy on the internet is likely and we may become subject to new laws and regulations applying to the solicitation, collection, processing or use of personal or consumer information that could affect how we store and process the data of our teachers and students. We generally comply with industry standards and are subject to the terms of our own privacy policies. Compliance with any additional laws could be expensive, and may place restrictions on the conduct of our business and the manner in which we interact with our students. Any failure to comply with applicable regulations could also result in regulatory enforcement actions against us.

        Significant capital and other resources may be required to protect against information security breaches or to alleviate problems caused by such breaches or to comply with our privacy policies or privacy-related legal obligations. The resources required may increase over time as the methods used by hackers and others engaged in online criminal activities are increasingly sophisticated and constantly evolving. Any failure or perceived failure by us to prevent information security breaches or to comply with privacy policies or privacy-related legal obligations, or any compromise of security that results in the unauthorized release or transfer of personally identifiable information or other student data, could cause our students to lose trust in us and could expose us to legal claims. Any perception by the public that online transactions or the privacy of user information are becoming increasingly unsafe or vulnerable to attacks could inhibit the growth of online education services generally, which may negatively impact our business prospects.

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Territorial disputes between China and the Philippines may disrupt the Philippine economy and business environment, which may negatively impact our business operations in the Philippines.

        The Philippines, China and several Southeast Asian nations have been engaged in a series of long-standing territorial disputes over certain islands in the South China Sea, also known as the West Philippine Sea. The Philippines maintains that its claim over the disputed territories is supported by recognized principles of international law consistent with the United Nations Convention on the Law of the Sea. The Philippines made several efforts during the course of 2011 and 2012 to establish a framework for resolving these disputes, calling for multilateral talks to delineate territorial rights and establish a framework for resolving disputes.

        In May 2014, Vietnamese ships collided with Chinese vessels in an area that both nations lay claim to, and where China is said to be setting up an oil rig. Also in May 2014, a Vietnamese fishing boat sank near the oil rig, and Vietnam released video footage showing a Chinese vessel gunning down the Vietnamese fishing boat. This incident has caused serious concerns for other Asian countries.

        Should these territorial disputes continue or escalate further, the Philippines and its economy may be disrupted and our operations could be adversely affected as a result. In particular, further disputes between the Philippines and China may lead both countries to impose trade restrictions on the other's imports. Any such impact from these disputes could adversely affect the Philippine economy, and materially and adversely affect our business, financial position and financial performance.

        Furthermore, as most of our teachers are from the Philippines, any significant deterioration in China's political relations with the Philippines could make it more difficult for us to attract teachers or hire employees in the Philippines, and discourage some of our students from purchasing our course packages or our teachers from offering lessons. Any prolonged intense diplomatic relations between China and the Philippines may adversely affect our business.

Our brand image, business and results of operations may be adversely impacted by students and teachers' misconduct and misuse of our platform.

        Our platforms allows teachers and students to engage in real-time communication. Because we do not have full control over how and what our teachers and students will use our platform to communicate, our platforms may from time to time be misused by individuals or groups of individuals to engage in immoral, disrespectful, fraudulent or illegal activities. Though there have not been any such incidents on our platform that have been covered by media reports or internet forums, any such coverage could generate negative publicity about our brand and platform. We have implemented control procedures, such as training and sample auditing, to require our teachers not to distribute any illegal or inappropriate content and conduct any illegal or fraudulent activities on our platforms, but such procedures may not prevent all such content or activities from being posted or carried out. Moreover, as we have limited control over the real-time and offline behavior of our students and teachers, to the extent such behavior is associated with our platforms, our ability to protect our brand image and reputation may be limited. Our business and the public perception of our brand may be materially and adversely affected by misuse of our platform. In addition, if any of our students or teachers suffers or alleges to have suffered physical, financial or emotional harm following contact initiated on our platform, we may face civil lawsuits or other liabilities initiated by the affected student or teacher, or governmental or regulatory actions against us. In response to allegations of illegal or inappropriate activities conducted on our platform or any negative media coverage about us, PRC governmental authorities may intervene and hold us liable for non-compliance with PRC laws and regulations concerning the dissemination of information on the internet and subject us to administrative penalties or other sanctions, such as requiring us to restrict or discontinue some of the features and services provided on our platform. As a result, our business may suffer and our brand image, student base, results of operations and financial condition may be materially and adversely affected.

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Our employees may engage in misconduct or other improper activities or misuse our platform, which could harm our reputation.

        We are exposed to the risk of employee fraud or other misconduct. Employee misconduct could include intentionally failing to comply government regulations, engaging in unauthorized activities and misrepresentation to our potential students during marketing activities, which could harm our reputation. Employee misconduct could also involve improper use of our students' and teachers' sensitive or classified information, which could result in regulatory sanctions against us and serious harm to our reputation. Employee misconduct could also involve making payments to government officials or third parties that would expose us to being in violation of laws. It is not always possible to deter employee misconduct, and the precautions we take to prevent and detect this activity may not be effective in controlling unknown or unmanaged risks or losses, which could harm our business, financial condition and results of operations.

We may be subject to allegations, harassment or other detrimental conduct by third parties, which could harm our reputation and adversely affect the price of our ADSs.

        We may be subject to allegations by third parties or purported current or former employees, negative internet postings and other adverse publicity related to our business and operations. We may also become the target of harassment or other detrimental conduct by third parties or disgruntled former or current employees. Such conduct may include complaints, anonymous or otherwise, to our board, advisors, regulatory agencies, media or other organizations. Depending on their nature and significance, we may need to conduct internal investigations to appropriately review any such allegations. We may also be subject to government or regulatory inquiries or, investigations or other proceedings as a result of such third-party conduct and may be required to spend significant time and incur substantial costs to address such conduct, and there is no assurance that we will be able to conclusively refute each of the allegations within a reasonable period of time, or at all. Additionally, allegations, directly or indirectly against us, may be posted on the internet, including social media platforms, by anyone anonymously. Any negative publicity about us or our management can be quickly and widely disseminated. Social media platforms and devices immediately publish the content of their subscribers' and participants' posts, often without filters or checks on the accuracy of the content posted. Information posted may be inaccurate and adverse to us, and it may harm our reputation, business or prospects. The harm may be immediate without affording us an opportunity for redress or correction. Our reputation may be negatively affected as a result of the public dissemination of negative and potentially false information about our business and operations, which in turn may cause us to lose market share or students, and adversely affect the price of our ADSs.

We may not be able to achieve the benefits we expect from recent and future acquisitions, and recent and future acquisitions may have an adverse effect on our ability to manage our business.

        We have made and intend to continue to make acquisitions or equity investments in additional businesses that complement our existing business. We may not be able to successfully integrate acquired businesses and we may not have control over the businesses or operations of our minority equity investments, the value of which may decline over time. As a result, our business and operating results could be harmed. In addition, if the businesses we acquire or invest in do not subsequently generate the anticipated financial performance or if any goodwill impairment test triggering event occurs, we may need to revalue or write down the value of goodwill and other intangible assets in connection with such acquisitions or investments, which would harm our results of operations. In addition, we may be unable to identify appropriate acquisition or strategic investment targets when it is necessary or desirable to make such acquisition or investment to remain competitive or to expand our business. Even if we identify an appropriate acquisition or investment target, we may not be able to negotiate the terms of the acquisition or investment successfully, finance the proposed transaction or integrate the relevant businesses into our existing business and operations. Furthermore, as we often do not have control over the companies in which we only have minority stake, we cannot ensure that these companies will always comply with

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applicable laws and regulations in their business operations. Material non-compliance by our investees may cause substantial harms to our reputations and the value of our investment.

Our use of some unregistered business premise could be challenged by the relevant government authorities, which may cause interruptions to our business operations.

        As of March 31, 2016, we leased eleven office facilities in China for our operations. A portion of our business premises, including the business premises we used for our experience center in Shanghai, have not been registered with the local counterpart of SAIC pursuant to the relevant PRC laws and regulations. If the relevant PRC government authorities discover or determine that Dasheng Zhixing conducts business at unregistered business premises, it may order Dasheng Zhingxing to make correction within a given period or to cease the use of such unregistered business premises as its business premises, and may concurrently levy a fine up to RMB 100,000 on Dasheng Zhixing. As of the date of this prospectus, we are not aware of any claims or actions being contemplated or initiated by governmental authorities or any other third parties with respect to our use of unregistered business premises to conduct our business in PRC. However, we cannot assure you that our use of such unregistered business premises will not be challenged. In addition, all of our leasehold interests in leased properties have not been registered with the relevant PRC governmental authorities as required by PRC law, which may expose us to potential fines.

Failure to renew our current leases or locate desirable alternatives for our facilities could materially and adversely affect our business.

        We lease properties for our offices in China and the Philippines. We may not be able to successfully extend or renew such leases upon expiration of the current term on commercially reasonable terms or at all, and may therefore be forced to relocate our affected operations. This could disrupt our operations and result in significant relocation expenses, which could adversely affect our business, financial condition and results of operations. In addition, we compete with other businesses for premises at certain locations or of desirable sizes. As a result, even though we could extend or renew our leases, rental payments may significantly increase as a result of the high demand for the leased properties. In addition, we may not be able to locate desirable alternative sites for our facilities as our business continues to grow and failure in relocating our affected operations could adversely affect our business and operations.

The wide variety of payment methods that we accept subjects us to third-party payment processing-related risks.

        We accept payments using a variety of methods, including bank transfers, online payments with credit cards and debit cards issued by major banks in China, and payment through third-party online payment platforms such as Alipay, 99Bill.com, UnionPay and WeChat Pay. For certain payment methods, including credit and debit cards, we pay interchange and other fees, which may increase over time and raise our operating costs and lower our profit margins. We may also be susceptible to fraud and other illegal activities in connection with the various payment methods we offer. We are also subject to various rules, regulations and requirements, regulatory or otherwise, governing electronic funds transfers which could change or be reinterpreted to make it difficult or impossible for us to comply. If we fail to comply with these rules or requirements, we may be subject to fines and higher transaction fees and become unable to accept credit and debit card payments from our students, process electronic funds transfers or facilitate other types of online payments, and our business, financial condition and results of operations could be materially and adversely affected.

If our senior management is unable to work together effectively or efficiently or if we lose their services, our business may be severely disrupted.

        Our success heavily depends upon the continued services of our management. In particular, we rely on the expertise and experience of Mr. Jack Jiajia Huang, our founder, chairman and chief executive officer, and Ms. Ting Shu, our co-founder, director and senior vice president, who are husband and wife. We also

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rely on the experience and services from other senior management, including Mr. Liming Zhang, our co-founder and chief operating officer, and Mr. Jimmy Lai, our chief financial officer. If they cannot work together effectively or efficiently, our business may be severely disrupted. If one or more of our senior management were unable or unwilling to continue in their present positions, we might not be able to replace them easily or at all, and our business, financial condition and results of operations may be materially and adversely affected. If any of our senior management joins a competitor or forms a competing business, we may lose students, teachers, and other key professionals and staff members. Our senior management has entered into employment agreements and confidentiality and non-competition agreements with us. However, if any dispute arises between our officers and us, we may have to incur substantial costs and expenses in order to enforce such agreements in China or we may be unable to enforce them at all.

Currency fluctuations in the Philippine Peso or Hong Kong dollars relative to Reminbi could increase our expenses.

        The Philippines continues to experience low growth in its gross domestic product, significant inflation, currency declines and shortages of foreign exchange. We are exposed to the risk of cost increases due to inflation in the Philippines. These conditions could create economic instability that could harm businesses operating in the Philippines. All of our revenue is denominated in Renminbi, and a significant portion of our costs are incurred in Philippine Pesos, including payments to nearly all of our teachers. We are therefore exposed to the risk of an increase in the value of the Philippine Peso relative to Renminbi, which would increase our expenses. As we currently engage a third-party vendor to handle the payment of the service fees of our teachers in the Philippines and we settle the balance with them in Hong Kong dollars, we are also exposed to the risk of an increase in the value of the Hong Kong dollar relative to Renminbi. We do not currently engage in any transactions as a hedge against risk of loss due to foreign currency fluctuations.

We are subject to certain regional political and economic risks that may have a material adverse effect on our results of operations.

        We engage teachers and operate offices in the Philippines. Accordingly, our business, results of operations and financial condition may be materially and adversely affected by significant political, social and economic developments in the Philippines or changes in Philippine laws and regulations. In particular, our Philippine operations and our operating results may be adversely affected by:

    changes in policies of the government or changes in laws and regulations, or in the interpretation or enforcement of these laws and regulations;

    measures that may be introduced to control inflation, such as interest rate increases or bank account withdrawal controls; and

    changes in the tax laws and regulations.

        The Philippines has historically experienced low growth in its gross domestic product, significant inflation and shortages of foreign exchange. We are exposed to the risk of rental and other cost increases due to inflation in the Philippines, which has historically been at a much higher rate than in the United States. These conditions could create political or economic instability that may harm our business and results of operations.

        In addition, the Philippines has and may in the future experience political instability, including strikes, demonstrations, protests, marches, coups d'état, guerilla activity or other types of civil disorder. These instabilities and any adverse changes in the political environment in the Philippines could increase our costs, increase our exposure to legal and business risks, disrupt our office operations in the Philippines or affect our ability to engage teachers.

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Our results of operations are subject to seasonal fluctuations.

        Our industry generally experiences seasonality, reflecting a combination of traditional education industry patterns and new patterns associated with the online platform in particular. Seasonal fluctuations have affected, and are likely to continue to affect, our business. In general, our industry experiences lower gross billings growth in the first quarter of each year due to the Chinese New Year holiday, and our industry enjoys higher gross billings growth during the summer months as K-12 students are generally on summer holiday and have more time to take lessons. Overall, the historical seasonality of our business has been relatively mild due to our rapid growth. As the percentage of K-12 students among our paying students and active students has been increasing during the past year, the seasonality may become more prominent, especially in the third quarter of each year. Due to our limited operating history, the seasonal trends that we have experienced in the past may not be indicative of our future operating results. Our financial condition and results of operations for future periods may continue to fluctuate. As a result, the trading price of our ADSs may fluctuate from time to time due to seasonality.

We have granted options, and may continue to grant options, restricted share units and other types of awards under our share incentive plans, which may result in increased share-based compensation expenses.

        We adopted share incentive plans in September 2013, or the 2013 Plan, and in December 2014, or the 2014 Plan. The 2014 Plan was amended in February 2016. Under the 2013 Plan and the 2014 Plan, we are authorized to grant options or share purchase rights to purchase up to an aggregate of 36,229,922 ordinary shares as of the date of this prospectus. As of March 31, 2016, options to purchase a total of 22,846,000 ordinary shares were issued and outstanding under the 2013 Plan and the 2014 Plan. The performance condition for the granted options will be satisfied upon completion of this offering. We will then record a significant cumulative stock-based compensation expense for those options for which the service condition has been satisfied as of such date. On the assumption the performance condition was satisfied on March 31, 2016, we would have recognized share-based compensation expense in the amount of RMB18.7 million (US$2.9 million) for those options on which service condition was satisfied on March 31, 2016. We believe the granting of share-based compensation is of significant importance to our ability to attract and retain key personnel and employees, and we will continue to grant share-based compensation to employees in the future. As a result, our expenses associated with share-based compensation may increase, which may have an adverse effect on our results of operations.

We have limited insurance coverage for our operations in China and the Philippines, which could expose us to significant costs and business disruption.

        We do not maintain any liability insurance or property insurance policies covering students, equipment and facilities for injuries, death or losses due to fire, earthquake, flood or any other disaster. Consistent with customary industry practice in China, we do not maintain business interruption insurance, nor do we maintain key-man life insurance. We maintain medical insurance for our management in China and provide government-mandated medical insurance to all of our employees in the Philippines with additional medical benefits to certain of our employees in the Philippines. However, as the insurance industry in China is still in an early stage of development, insurance companies in China currently offer limited business-related insurance products. We also have limited experience dealing with the insurance industry in the Philippines. We do not maintain business interruption insurance, nor do we maintain key-man life insurance. We cannot assure you that our insurance coverage is sufficient to prevent us from any loss or that we will be able to successfully claim our losses under our current insurance policy on a timely basis, or at all. If we incur any loss that is not covered by our insurance policies, or the compensated amount is significantly less than our actual loss, our business, financial condition and results of operations could be materially and adversely affected.

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If we fail to implement and maintain an effective system of internal controls, we may be unable to accurately or timely report our results of operations or prevent fraud, and investor confidence and the market price of our ADSs may be materially and adversely affected.

        Prior to this offering, we were a private company with limited accounting personnel and other resources with which to address our internal controls and procedures. Our independent registered public accounting firm has not conducted an audit of our internal control over financial reporting. However, in connection with the audit of our consolidated financial statements as of December 31, 2015 and for the year ended December 31, 2015, we and our independent registered public accounting firm identified a material weakness in our internal control over financial reporting and other control deficiencies as of December 31, 2015. As defined in standards established by the United States Public Company Accounting Oversight Board, or the PCAOB, a "material weakness" is a deficiency, or a combination of deficiencies, in internal control over financial reporting, such that there is a reasonable possibility that a material misstatement of the company's annual or interim financial statements will not be prevented or detected on a timely basis. The material weakness identified is related to the lack of sufficient financial reporting and accounting personnel with appropriate knowledge and experience to establish and implement key controls over period end closing and financial reporting and to properly prepare and review financial statements and related disclosures in accordance with U.S. GAAP and SEC reporting requirements. Following the identification of the material weakness and other control deficiencies, we have taken measures and plan to continue to take measures to remedy these deficiencies. For details of these remedies, see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Internal Control over Financial Reporting." However, the implementation of these measures may not fully address the material weakness and deficiencies in our internal control over financial reporting, and we cannot conclude that they have been fully remedied. Our failure to correct the material weakness and control deficiencies or our failure to discover and address any other material weakness or control deficiencies could result in inaccuracies in our financial statements and could also impair our ability to comply with applicable financial reporting requirements and related regulatory filings on a timely basis. As a result, our business, financial condition, results of operations and prospects, as well as the trading price of our ADSs, may be materially and adversely affected. Moreover, ineffective internal control over financial reporting significantly hinders our ability to prevent fraud.

        Furthermore, it is possible that, had our independent registered public accounting firm conducted an audit of our internal control over financial reporting, such accountant might have identified additional material weaknesses and deficiencies. Upon completion of this offering, we will become subject to the Sarbanes-Oxley Act of 2002. Section 404 of the Sarbanes-Oxley Act, or Section 404, will require that we include a report from management on the effectiveness of our internal control over financial reporting in our annual report on Form 20-F beginning with our annual report for the fiscal year ending December 31, 2017. In addition, once we cease to be an "emerging growth company" as such term is defined in the JOBS Act, our independent registered public accounting firm must attest to and report on the effectiveness of our internal control over financial reporting. Our management may conclude that our internal control over financial reporting is not effective. Moreover, even if our management concludes that our internal control over financial reporting is effective, our independent registered public accounting firm, after conducting its own independent testing, may issue a report that is qualified if it is not satisfied with our internal controls or the level at which our controls are documented, designed, operated or reviewed, or if it interprets the relevant requirements differently from us. In addition, after we become a public company, our reporting obligations may place a significant strain on our management, operational and financial resources and systems for the foreseeable future. We may be unable to timely complete our evaluation testing and any required remediation.

        During the course of documenting and testing our internal control procedures, in order to satisfy the requirements of Section 404, we may identify other weaknesses and deficiencies in our internal control over financial reporting. In addition, if we fail to maintain the adequacy of our internal control over

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financial reporting, as these standards are modified, supplemented or amended from time to time, we may not be able to conclude on an ongoing basis that we have effective internal control over financial reporting in accordance with Section 404. If we fail to achieve and maintain an effective internal control environment, we could suffer material misstatements in our financial statements and fail to meet our reporting obligations, which would likely cause investors to lose confidence in our reported financial information. This could in turn limit our access to capital markets, harm our results of operations, and lead to a decline in the trading price of our ADSs. Additionally, ineffective internal control over financial reporting could expose us to increased risk of fraud or misuse of corporate assets and subject us to potential delisting from the stock exchange on which we list, regulatory investigations and civil or criminal sanctions. We may also be required to restate our financial statements from prior periods.

The audit report included in this prospectus is prepared by auditors who are not inspected by the Public Company Accounting Oversight Board, and, as such, you are deprived of the benefits of such inspection.

        The independent registered public accounting firm that issues the audit reports included in this prospectus filed with the SEC, as auditors of companies that are traded publicly in the United States of America, or the United States, and a firm registered with the PCAOB, is required by the laws of the United States to undergo regular inspections by the PCAOB to assess its compliance with the laws of the United States and professional standards. Because our auditors are located in the PRC, a jurisdiction where the PCAOB is currently unable to conduct inspections without the approval of the Chinese authorities, our auditors are not currently inspected by the PCAOB. In May 2013, PCAOB announced that it had entered into a Memorandum of Understanding on Enforcement Cooperation with the CSRC and the PRC Ministry of Finance, which establishes a cooperative framework between the parties for the production and exchange of audit documents relevant to investigations undertaken by PCAOB, the CSRC or the PRC Ministry of Finance in the United States and the PRC, respectively. PCAOB continues to be in discussions with the CSRC and the PRC Ministry of Finance to permit joint inspections in the PRC of audit firms that are registered with PCAOB and audit Chinese companies that trade on U.S. exchanges.

        Inspections of other firms that the PCAOB has conducted outside China have identified deficiencies in those firms' audit procedures and quality control procedures, which may be addressed as part of the inspection process to improve future audit quality. This lack of PCAOB inspections in China prevents the PCAOB from regularly evaluating our auditor's audits and its quality control procedures. As a result, investors may be deprived of the benefits of PCAOB inspections.

        The inability of the PCAOB to conduct inspections of auditors in China makes it more difficult to evaluate the effectiveness of our auditor's audit procedures or quality control procedures as compared to auditors outside of China that are subject to PCAOB inspections. Investors may lose confidence in our reported financial information and procedures and the quality of our financial statements.

If additional remedial measures are imposed on the Big Four PRC-based accounting firms, including our independent registered public accounting firm, in administrative proceedings brought by the SEC alleging the firms' failure to meet specific criteria set by the SEC, we could be unable to timely file future financial statements in compliance with the requirements of the Exchange Act.

        In December 2012, the SEC instituted administrative proceedings under Rule 102(e)(1)(iii) of the SEC's Rules of Practice against the Big Four PRC-based accounting firms, including our independent registered public accounting firm, alleging that these firms had violated U.S. securities laws and the SEC's rules and regulations thereunder by failing to provide to the SEC the firms' audit work papers with respect to certain PRC-based companies that are publicly traded in the United States. Rule 102(e)(1)(iii) authorizes the SEC to deny any person, temporarily or permanently, the ability to practice before the SEC if found by the SEC, after notice and opportunity for a hearing, to have willfully violated any such laws or rules and regulations. On January 22, 2014, the administrative law judge, or the ALJ, presiding over the matter rendered an initial decision that each of the firms had violated the SEC's rules of practice by failing

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to produce audit workpapers to the SEC. The initial decision censured each of the firms and barred them from practicing before the SEC for a period of six months. On February 12, 2014, the Big Four PRC-based accounting firms appealed the ALJ's initial decision to the SEC. The ALJ's decision does not take effect unless and until it is endorsed by the SEC. On February 6, 2015, the four China-based accounting firms each agreed to a censure and to pay a fine to the SEC to settle the dispute and avoid suspension of their ability to practice before the SEC and audit U.S.-listed companies. The settlement required the firms to follow detailed procedures and to seek to provide the SEC with access to Chinese firms' audit documents via the China Securities Regulation Commission, or the CSRC, in response to future document requests by the SEC made through the CSRC. If the Big Four PRC-based accounting firms, including our independent registered public accounting firm, fail to comply with the documentation production procedures that are in the settlement agreement or if there is a failure of the process between the SEC and the CSRC, the SEC retains authority to impose a variety of additional remedial measures on the firms, such as imposing penalties on the firms and restarting the proceedings against the firms, depending on the nature of the failure.

        In the event that the SEC restarts the administrative proceedings, depending upon the final outcome, listed companies in the United States with major PRC operations may find it difficult or impossible to retain auditors in respect of their operations in the PRC, which could result in financial statements being determined to not be in compliance with the requirements of the Exchange Act, including possible delisting. Moreover, any negative news about the proceedings against these audit firms may cause investor uncertainty regarding PRC-based, United States-listed companies and the market price of our ADSs may be adversely affected.

        If the accounting firms are subject to additional remedial measures, our ability to file our financial statements in compliance with SEC requirements could be impacted. A determination that we have not timely filed financial statements in compliance with SEC requirements could ultimately lead to the delisting of our ADSs from the [NYSE/NASDAQ Global Market] or the termination of the registration of our ADSs under the Exchange Act, or both, which would substantially reduce or effectively terminate the trading of our ADSs in the United States.

We face risks related to natural and other disasters, including severe weather conditions or outbreaks of health epidemics, and other extraordinary events, which could significantly disrupt our operations.

        Our business could be adversely affected by natural disasters or the outbreak of avian influenza, severe acute respiratory syndrome, or SARS, the influenza A (H1N1), H7N9 or other epidemic. Any of such occurrences could cause severe disruption to our daily operations, and may even require a temporary closure of our facilities. Such closures may disrupt our business operations and adversely affect our results of operations. Our operation could also be disrupted if our students, teachers or business partners were affected by such natural disasters or health epidemics.

Risks Related to Our Corporate Structure

If the PRC government finds that the contractual arrangements that establish the structure for holding our ICP license do not comply with applicable PRC laws and regulations, we could be subject to severe penalties or be forced to relinquish our interests in those operations.

        Foreign ownership in entities that provide value-added telecommunication services, is subject to restrictions under current PRC laws and regulations. For example, in accordance with the Guidance Catalog of Industries for Foreign Investment, as amended in 2015, and other applicable laws and regulations, foreign investors are not allowed to own more than 50% of the equity interests in a value-added telecommunication service provider (except for e-commerce) and any such foreign investor must have experience in providing value-added telecommunications services overseas and maintain a good track record.

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        We are a Cayman Islands company and our PRC subsidiary, Beijing Dasheng Online Technology Co., Ltd., or Dasheng Online, is considered a foreign-invested enterprise. To comply with PRC laws and regulations, we operate our www.51talk.com website through our PRC consolidated VIE, Beijing Dasheng Zhixing Technology Co., Ltd., or Dasheng Zhixing. Dasheng Zhixing holds our ICP License for www.51talk.com. Dasheng Zhixing is 61.25% owned by Mr. Jiajia Huang, 26.25% owned by Ms. Ting Shu and 12.5% owned by Ms. Ling Chen. All shareholders of Dasheng Zhixing are PRC citizens. We entered into a series of contractual arrangements with Dasheng Zhixing and its shareholders, which enable us to:

    exercise effective control over Dasheng Zhixing;

    receive substantially all of the economic benefits; and

    have an exclusive option to purchase all or part of the equity interests in Dasheng Zhixing when and to the extent permitted by PRC law.

        Because of these contractual arrangements, we are the primary beneficiary of Dasheng Zhixing and treat it as our PRC consolidated VIE under U.S. GAAP. We consolidate the financial results of Dasheng Zhixing in our consolidated financial statements in accordance with U.S. GAAP. For a detailed discussion of these contractual arrangements, see "Corporate History and Structure."

        Han Kun Law Offices, our PRC legal counsel, is of the opinion that (i) the ownership structure of Dasheng Zhixing and Dasheng Online, both currently and immediately after giving effect to this offering, will not result in any violation of PRC laws or regulations currently in effect; and (ii) the contractual arrangements among Dasheng Online, Dasheng Zhixing and its shareholders governed by PRC law both currently and immediately after giving effect to this offering are valid, binding and enforceable, and will not result in any violation of PRC laws or regulations currently in effect. There are, however, substantial uncertainties regarding the interpretation and application of current or future PRC laws and regulations concerning foreign investment in the PRC, and their application to and effect on the legality, binding effect and enforceability of the contractual arrangements. In particular, we cannot rule out the possibility that PRC regulatory authorities, courts or arbitral tribunals may in the future adopt a different or contrary interpretation or take a view that is inconsistent with the opinion of our PRC legal counsel.

        It is uncertain whether any new PRC laws, rules or regulations relating to VIE structures will be adopted or if adopted, what affect they may have on our corporate structure. In particular, in January 2015, the Ministry of Commerce, or MOC, published a discussion draft of the proposed Foreign Investment Law for public review and comments. Among other things, the draft Foreign Investment Law expands the definition of foreign investment and introduces the principle of "actual control" in determining whether a company is considered a foreign-invested enterprise, or an FIE. Under the draft Foreign Investment Law, VIEs would be deemed as FIEs, if they are ultimately "controlled" by foreign investors, and would thus be subject to restrictions on foreign investments. However, the draft law has not taken a position on what actions will be taken with respect to existing companies with a "variable interest entity" structure, whether or not these companies are controlled by Chinese parties. It is uncertain when the draft would be signed into law and whether the final version would have any substantial changes from the draft. See "Regulation—The Draft PRC Foreign Investment Law" and "—Substantial uncertainties exist with respect to the enactment timetable, interpretation and implementation of draft PRC Foreign Investment Law and how it may impact the viability of our current corporate structure, corporate governance and business operations."

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        If, as a result of such contractual arrangement, we or Dasheng Zhixing is found to be in violation of any existing or future PRC laws or regulations, or such contractual arrangement is determined as illegal and invalid by the PRC court, arbitral tribunal or regulatory authorities, or we fail to obtain, maintain or renew any of the required permits or approvals, the relevant PRC regulatory authorities would have broad discretion to take action in dealing with such violations or failures, including:

    revoking the business licenses and/or operating licenses of Dasheng Online and/or Dasheng Zhixing;

    discontinuing or restricting the conduct of any transactions between Dasheng Online and Dasheng Zhixing;

    limiting our business expansion in China by way of entering into contractual arrangements;

    imposing fines, confiscating the income from Dasheng Zhixing, or imposing other requirements with which we or Dasheng Zhixing may not be able to comply with;

    shutting down our servers or blocking our websites;

    requiring us to restructure our ownership structure or operations, including terminating the contractual arrangements with Dasheng Zhixing and deregistering the equity pledges of Dasheng Zhixing;

    restricting or prohibiting our use of the proceeds of this offering to finance our business and operations in China;

    imposing additional conditions or requirements with which we may not be able to comply with; or

    take other regulatory or enforcement actions against us that could be harmful to our business.

        The imposition of any of these penalties could result in a material and adverse effect on our ability to conduct our business and on our results of operations. If any of these penalties results in our inability to direct the activities of Dasheng Zhixing that most significantly impact its economic performance, and/or our failure to receive the economic benefits from Dasheng Zhixing, we may not be able to consolidate Dasheng Zhixing in our consolidated financial statements in accordance with U.S. GAAP.

We rely on contractual arrangements with Dasheng Zhixing and its shareholders for a portion of our business operations, which may not be as effective as direct ownership in providing operational control.

        We have relied and expect to continue to rely on contractual arrangements with Dasheng Zhixing, as well as its respective shareholders, to operate our www.51talk.com website and mobile apps. For a description of these contractual arrangements, see "Corporate History and Structure." These contractual arrangements may not be as effective as direct ownership in providing us with control over Dasheng Zhixing. For example, Dasheng Zhixing and its shareholders could breach their contractual arrangements with us by, among other things, failing to conduct their operations, including maintaining our website and using the domain names and trademarks, in an acceptable manner or taking other actions that are detrimental to our interests.

        If we had direct ownership of Dasheng Zhixing, we would be able to exercise our rights as a shareholder to effect changes in the board of directors of Dasheng Zhixing, which in turn could effect changes, subject to any applicable fiduciary obligations, at the management level. However, under the current contractual arrangements, we rely on the performance by Dasheng Zhixing and its shareholders of their obligations under the contracts to exercise control over Dasheng Zhixing. However, the shareholders of Dasheng Zhixing may not act in the best interests of our company or may not perform their obligations under these contracts. Such risks exist throughout the period in which we intend to operate our business through the contractual arrangements with Dasheng Zhixing. We may replace the shareholders of Dasheng Zhixing at any time pursuant to our contractual arrangements with it and its shareholders. However, if any

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dispute relating to these contracts remains unresolved, we will have to enforce our rights under these contracts through the operations of PRC law and therefore will be subject to uncertainties in the PRC legal system. See "—Any failure by Dasheng Zhixing, Philippines Co I, Philippines Co II, Philippines Co III or their respective shareholders to perform their obligations under our contractual arrangements with them would have a material and adverse effect on our business." Therefore, our contractual arrangements with Dasheng Zhixing may not be as effective in ensuring our control over the relevant portion of our business operations as direct ownership would be.

Substantial uncertainties exist with respect to the enactment timetable, interpretation and implementation of draft PRC Foreign Investment Law and how it may impact the viability of our current corporate structure, corporate governance and business operations.

        The Ministry of Commerce published a discussion draft of the proposed Foreign Investment Law in January 2015 aiming to, upon its enactment, replace the trio of existing laws regulating foreign investment in China, namely, the Sino-foreign Equity Joint Venture Enterprise Law, the Sino-foreign Cooperative Joint Venture Enterprise Law and the Wholly Foreign-invested Enterprise Law. The draft Foreign Investment Law embodies an expected PRC regulatory trend to rationalize its foreign investment regulatory regime in line with prevailing international practice and the legislative efforts to unify the corporate legal requirements for both foreign and domestic investments. While the Ministry of Commerce solicited comments on this draft in early 2015, substantial uncertainties exist with respect to its enactment timetable, interpretation and implementation. The draft Foreign Investment Law, if enacted as proposed, may materially impact the viability of our current corporate structure, corporate governance and business operations in many aspects.

        Among other things, the draft Foreign Investment Law expands the definition of foreign investment and introduces the principle of "actual control" in determining whether a company is considered an FIE. The draft Foreign Investment Law specifically provides that entities established in China but "controlled" by foreign investors will be treated as FIEs, whereas an entity set up in a foreign jurisdiction would nonetheless be, upon market entry clearance by the Ministry of Commerce, treated as a PRC domestic investor provided that the entity is "controlled" by PRC entities and/or citizens. In this connection, "foreign investors" refers to the following subjects making investments within the PRC: (i) natural persons without PRC nationality; (ii) enterprises incorporated under the laws of countries or regions other than China; (iii) the governments of countries or regions other than the PRC and the departments or agencies thereunder; and (iv) international organizations. Domestic enterprises under the control of the subjects as mentioned in the preceding sentence are deemed foreign investors, and "control" is broadly defined in the draft law to cover the following summarized categories: (i) holding, directly or indirectly, not less than 50% of shares, equities, share of voting rights or other similar rights of the subject entity; (ii) holding, directly or indirectly, less than 50% of the voting rights of the subject entity but having the power to secure at least 50% of the seats on the board or other equivalent decision making bodies, or having the voting power to material influence on the board, the shareholders' meeting or other equivalent decision making bodies; or (iii) having the power to exert decisive influence, via contractual or trust arrangements, over the subject entity's operations, financial matters or other key aspects of business operations. Once an entity is determined to be an FIE, it will be subject to the foreign investment restrictions or prohibitions set forth in a "catalogue of special administrative measures," which is classified into the "catalogue of prohibitions" and "the catalogue of restrictions," to be separately issued by the State Council later. Foreign investors are not allowed to invest in any sector set forth in the catalogue of prohibitions. However, unless the underlying business of the FIE falls within the catalogue of restrictions, which calls for market entry clearance by the Ministry of Commerce, prior approval from governmental authorities as mandated by the existing foreign investment legal regime would no longer be required for establishment of the FIE.

        The "variable interest entity" structure, or VIE structure, has been adopted by many PRC-based companies, including us, to obtain necessary licenses and permits in the industries that are currently subject to foreign investment restrictions in China. See "—If the PRC government finds that the

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contractual arrangements that establish the structure for holding our ICP license do not comply with applicable PRC laws and regulations, we could be subject to severe penalties or be forced to relinquish our interests in those operations" and "Our Corporate History and Structure." Under the draft Foreign Investment Law, VIEs that are controlled via contractual arrangement would also be deemed as FIEs, if they are ultimately "controlled" by foreign investors. Therefore, for any companies with a VIE structure in an industry category that is on the "catalogue of restrictions," the VIE structure may be deemed a domestic investment only if the ultimate controlling person(s) is/are of PRC nationality (either PRC companies or PRC citizens). Conversely, if the actual controlling person(s) is/are of foreign nationalities, then the VIEs will be treated as FIEs and any operation in the industry category on the "catalogue of restrictions" without market entry clearance may be considered as illegal.

        In addition, the draft Foreign Investment Law does not indicate what actions shall be taken with respect to the existing companies with a VIE structure, whether or not these companies are controlled by Chinese parties. Moreover, it is uncertain whether the online education industry, in which our PRC consolidated VIE operate, will be subject to the foreign investment restrictions or prohibitions set forth in the "catalogue of special administrative measures" to be issued. If the enacted version of the Foreign Investment Law and the final "catalogue of special administrative measures" mandate further actions, such as the Ministry of Commerce market entry clearance, to be completed by companies with an existing VIE structure like us, we face uncertainties as to whether such clearance can be timely obtained, or at all.

        The draft Foreign Investment Law, if enacted as proposed, may also materially impact our corporate governance practice and increase our compliance costs. For instance, the draft Foreign Investment Law imposes stringent ad hoc and periodic information reporting requirements on foreign investors and the applicable FIEs. Aside from an investment information report required at each investment, and investment amendment reports, which shall be submitted upon alteration of investment specifics, it is mandatory for entities established by foreign investors to submit an annual report, and large foreign investors meeting certain criteria are required to report on a quarterly basis. Any company found to be non-compliant with these reporting obligations may potentially be subject to fines and/or administrative or criminal liabilities, and the persons directly responsible may be subject to criminal liabilities.

Any failure by Dasheng Zhixing, Philippines Co I, Philippines Co II, Philippines Co III or their respective shareholders to perform their obligations under our contractual arrangements with them would have a material and adverse effect on our business.

        If Dasheng Zhixing, Philippines Co I, Philippines Co II, Philippines Co III or their respective shareholders fail to perform their obligations under the contractual arrangements, we may have to incur substantial costs and expend additional resources to enforce such arrangements. We may also have to rely on legal remedies under PRC law or Philippine law, including seeking specific performance or injunctive relief, and claiming damages, which we cannot assure you will be effective. For example, if the shareholders of Dasheng Zhixing, Philippines Co I, Philippines Co II or Philippines Co III were to refuse to transfer their equity interest in Dasheng Zhixing, Philippines Co I, Philippines Co II or Philippines Co III to us or our designee if we exercise the purchase option pursuant to these contractual arrangements, or if they were otherwise to act in bad faith toward us, then we may have to take legal actions to compel them to perform their contractual obligations.

        All the agreements under our contractual arrangements with Dasheng Zhixing are governed by PRC law and provide for the resolution of disputes through arbitration in China. Accordingly, these contracts would be interpreted in accordance with PRC law and any disputes would be resolved in accordance with PRC legal procedures. The legal system in the PRC is not as developed as in some other jurisdictions, such as the United States. As a result, uncertainties in the PRC legal system could limit our ability to enforce these contractual arrangements. Under PRC law, if the losing parties fail to carry out the arbitration awards within a prescribed time limit, the prevailing parties may only enforce the arbitration awards in PRC courts through arbitration award recognition proceedings, which would require additional expenses

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and delay. In the event we are unable to enforce these contractual arrangements, we may not be able to exert effective control over Dasheng Zhixing, and our ability to conduct our business may be negatively affected.

If the custodians or authorized users of our controlling non-tangible assets, including chops and seals, fail to fulfill their responsibilities, or misappropriate or misuse these assets, our business and operations could be materially and adversely affected.

        Under PRC law, legal documents for corporate transactions, including agreements and contracts such as the leases and sales contracts that our business relies on, are executed using the chop or seal of the signing entity or with the signature of a legal representative whose designation is registered and filed with the relevant local branch of the SAIC. We generally execute legal documents by affixing chops or seals, rather than having the designated legal representatives sign the documents.

        We have three major types of chops—corporate chops, contract chops and finance chops. We use corporate chops generally for documents to be submitted to government agencies, such as applications for changing business scope, directors or company name, and for legal letters. We use contract chops for executing leases and commercial, contracts. We use finance chops generally for making and collecting payments, including, but not limited to issuing invoices. Use of corporate chops and contract chops must be approved by our legal department and administrative department, and use of finance chops must be approved by our finance department. The chops of our PRC subsidiary and our PRC consolidated VIE are generally held by the relevant entities so that documents can be executed locally. Although we usually utilize chops to execute contracts, the registered legal representatives of our PRC subsidiary and our PRC consolidated VIE have the apparent authority to enter into contracts on behalf of such entities without chops, unless such contracts set forth otherwise. All designated legal representatives of our PRC subsidiary and our PRC consolidated VIE have signed employment agreements with us under which they agree to abide by duties they owe to us.

        In order to maintain the physical security of our chops, we generally have them stored in secured locations accessible only to the department heads of the legal, administrative or finance departments. Our designated legal representatives generally do not have access to the chops. Although we monitor our employees, including the designated legal representatives of our PRC subsidiary and our consolidated VIE, the procedures may not be sufficient to prevent all instances of abuse or negligence. There is a risk that our employees or designated legal representatives could abuse their authority, for example, by binding the relevant subsidiary or consolidated VIE with contracts against our interests, as we would be obligated to honor these contracts if the other contracting party acts in good faith in reliance on the apparent authority of our chops or signatures of our legal representatives. If any designated legal representative obtains control of the chop in an effort to obtain control over the relevant entity, we would need to have a shareholder or board resolution to designate a new legal representative and to take legal action to seek the return of the chop, apply for a new chop with the relevant authorities, or otherwise seek legal remedies for the legal representative's misconduct. If any of the designated legal representatives obtains and misuses or misappropriates our chops and seals or other controlling intangible assets for whatever reason, we could experience disruption to our normal business operations. We may have to take corporate or legal action, which could involve significant time and resources to resolve while distracting management from our operations.

The shareholders of Dasheng Zhixing may have potential conflicts of interest with us, which may materially and adversely affect our business and financial condition.

        We have designated individuals who are PRC nationals to be the shareholders of Dasheng Zhixing. Dasheng Zhixing is owned by Mr. Jiajia Huang, Ms. Ting Shu and Ms. Ling Chen. The interests of these individuals as the shareholders of Dasheng Zhixing may differ from the interests of our company as a whole. These shareholders may breach, or cause our PRC consolidated VIE to breach, or refuse to renew,

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the existing contractual arrangements we have with them and Dasheng Zhixing, which would have a material and adverse effect on our ability to effectively control Dasheng Zhixing. We cannot assure you that when conflicts of interest arise, any or all of these shareholders will act in the best interests of our company or such conflicts will be resolved in our favor.

        Currently, we do not have any arrangements to address potential conflicts of interest between these shareholders and our company, except that we could exercise our purchase option under the purchase option agreements with these shareholders to request them to transfer all of their equity ownership in Dasheng Zhixing to Dasheng Online or one or more individuals designated by us. We rely on Mr. Jack Jiajia Huang, Ms. Ting Shu and Ms. Ling Chen, among which Mr. Huang and Ms. Shu are also our directors, to abide by PRC law, which provides that directors owe a fiduciary duty to the company. Such fiduciary duty requires directors to act in good faith and in the best interests of the company and not to use their positions for personal gains. If we cannot resolve any conflict of interest or dispute between us and the shareholders of Dasheng Zhixing, we would have to rely on legal proceedings, which could result in disruption of our business and subject us to substantial uncertainty as to the outcome of any such legal proceedings.

We may rely on dividends and other distributions on equity paid by our PRC subsidiary to fund any cash and financing requirements we may have, and any limitation on the ability of our PRC subsidiary to make payments to us could have a material and adverse effect on our ability to conduct our business.

        We are a holding company, and we may rely on dividends and other distributions on equity paid by our PRC subsidiary, Dasheng Online, for our cash and financing requirements, including the funds necessary to pay dividends and other cash distributions to our shareholders and service any debt we may incur. If our PRC subsidiary incurs debt on its own behalf in the future, the instruments governing the debt may restrict its ability to pay dividends or make other distributions to us. In addition, the PRC tax authorities may require Dasheng Online to adjust its taxable income under the contractual arrangements it currently has in place with our PRC consolidated VIE in a manner that would materially and adversely affect its ability to pay dividends and other distributions to us. See "—Our contractual arrangements may be subject to scrutiny by the PRC tax authorities, and a finding that we owe additional taxes could substantially reduce our consolidated net income and the value of your investment."

        Under PRC laws and regulations, our PRC subsidiary, which is a wholly foreign-owned enterprise may pay dividends only out of its respective accumulated profits as determined in accordance with PRC accounting standards and regulations. In addition, a wholly foreign-owned enterprise is required to set aside at least 10% of its accumulated after-tax profits each year, if any, to fund a certain statutory reserve fund, until the aggregate amount of such fund reaches 50% of its registered capital. At its discretion, a wholly foreign-owned enterprise may allocate a portion of its after-tax profits based on PRC accounting standards to an enterprise expansion fund, or a staff welfare and bonus fund. The statutory reserve funds, enterprise expansion funds and staff welfare and bonus funds are not distributable as cash dividends.

        Any limitation on the ability of our PRC subsidiary to pay dividends or make other distributions to us could materially and adversely limit our ability to grow, make investments or acquisitions that could be beneficial to our business, pay dividends, or otherwise fund and conduct our business. See also "—Risks Related to Doing Business in China—Under the PRC Enterprise Income Tax Law, we may be classified as a PRC "resident enterprise" for PRC enterprise income tax purposes. Such classification would likely result in unfavorable tax consequences to us and our non-PRC shareholders and has a material adverse effect on our results of operations and the value of your investment."

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Our contractual arrangements may be subject to scrutiny by the PRC tax authorities, and a finding that we owe additional taxes could substantially reduce our consolidated net income and the value of your investment.

        Under PRC laws and regulations, arrangements and transactions among related parties may be subject to audit or challenge by the PRC tax authorities. We could face material and adverse tax consequences if the PRC tax authorities determine that the contractual arrangements among our PRC subsidiary and our PRC consolidated VIE do not represent an arm's-length price and adjust our PRC consolidated VIE's income in the form of a transfer pricing adjustment. A transfer pricing adjustment could, among other things, result in a reduction, for PRC tax purposes, of expense deductions recorded by our PRC consolidated VIE, which could in turn increase their tax liabilities. In addition, the PRC tax authorities may impose late payment fees and other penalties to our PRC consolidated VIE for under-paid taxes. Our consolidated net income may be materially and adversely affected if our tax liabilities increase or if we are found to be subject to late payment fees or other penalties.

If Dasheng Zhixing becomes the subject of a bankruptcy or liquidation proceeding, we may lose the ability to use and enjoy its assets, which could reduce the size of our operations and materially and adversely affect our business, ability to generate revenues and the market price of our ADSs.

        To comply with PRC laws and regulations relating to foreign ownership restrictions in the online value-added telecommunications business, we hold our ICP license through contractual arrangements with Dasheng Zhixing, our PRC consolidated VIE, as well as its shareholders. As part of these arrangements, Dasheng Zhixing holds assets that are important to the operation of our business.

        We do not have priority pledges and liens against Dasheng Zhixing's assets. As a contractual and property right matter, this lack of priority pledges and liens has remote risks. If Dasheng Zhixing undergoes an involuntary liquidation proceeding, third-party creditors may claim rights to some or all of its assets and we may not have priority against such third-party creditors on Dasheng Zhixing's assets. If Dasheng Zhixing liquidates, we may take part in the liquidation procedures as a general creditor under the PRC Enterprise Bankruptcy Law and recover any outstanding liabilities owed by Dasheng Zhixing to Dasheng Online under the applicable service agreements. To ameliorate the risks of an involuntary liquidation proceeding initiated by a third-party creditor, we closely monitor the operations and finances of Dasheng Zhixing through carefully designed budgetary and internal controls to ensure that Dasheng Zhixing is well capitalized and is highly unlikely to trigger any third-party monetary claims in excess of its assets and cash resources. Furthermore, Dasheng Online has the ability, if necessary, to provide finance support to Dasheng Zhixing to prevent such an involuntary liquidation.

        If the shareholders of Dasheng Zhixing were to attempt to voluntarily liquidate Dasheng Zhixing without obtaining our prior consent, we could effectively prevent such unauthorized voluntary liquidation by exercising our right to request Dasheng Zhixing's shareholders to transfer all of their equity ownership interest to Dasheng Online or one or more individuals designated by us in accordance with the option agreements with the shareholders of Dasheng Zhixing. In the event that the shareholders of Dasheng Zhixing initiates a voluntary liquidation proceeding without our authorization or attempts to distribute the retained earnings or assets of Dasheng Zhixing without our prior consent, we may need to resort to legal proceedings to enforce the terms of the contractual agreements. Any such litigation may be costly and may divert our management's time and attention away from the operation of our business, and the outcome of such litigation would be uncertain.

Risks Related to Doing Business in China

Uncertainties in the interpretation and enforcement of PRC laws and regulations could limit the legal protections available to you and us.

        The PRC legal system is based on written statutes. Unlike common law systems, it is a system in which legal cases have limited value as precedents. In the late 1970s, the PRC government began to promulgate a

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comprehensive system of laws and regulations governing economic matters in general. The overall effect of legislation over the past three decades has significantly increased the protections afforded to various forms of foreign or private-sector investment in China. Our PRC subsidiary is subject to various PRC laws and regulations generally applicable to companies in China. However, since these laws and regulations are relatively new and the PRC legal system continues to rapidly evolve, the interpretations of many laws, regulations and rules are not always uniform and enforcement of these laws, regulations and rules involve uncertainties.

        From time to time, we may have to resort to administrative and court proceedings to enforce our legal rights. However, since PRC administrative and court authorities have significant discretion in interpreting and implementing statutory and contractual terms, it may be more difficult to evaluate the outcome of administrative and court proceedings and the level of legal protection we enjoy than in more developed legal systems. Furthermore, the PRC legal system is based in part on government policies and internal rules (some of which are not published in a timely manner or at all) that may have retroactive effect. As a result, we may not be aware of our violation of these policies and rules until sometime after the violation. Such uncertainties, including uncertainty over the scope and effect of our contractual, property (including intellectual property) and procedural rights, and any failure to respond to changes in the regulatory environment in China could materially and adversely affect our business and impede our ability to continue our operations.

We may be adversely affected by the complexity, uncertainties and changes in PRC regulation of internet-related business and companies.

        The PRC government extensively regulates the internet industry, including foreign ownership of, and the licensing and permit requirements pertaining to, companies in the internet industry. These internet-related laws and regulations are relatively new and evolving, and their interpretation and enforcement involves significant uncertainties. As a result, in certain circumstances it may be difficult to determine what actions or omissions may be deemed to be in violation of applicable laws and regulations. Issues, risks and uncertainties relating to PRC governmental regulation of the internet industry include, but are not limited to, the following.

        We only have control over our website through contractual arrangements. We do not own the website in China due to the restriction of foreign investment in businesses providing value-added telecommunication services in China, including internet information provision services. This may significantly disrupt our business, subject us to sanctions, compromise enforceability of related contractual arrangements, or have other harmful effects on us.

        The evolving PRC regulatory system for the internet industry may lead to the establishment of new regulatory agencies. For example, in May 2011, the State Council announced the establishment of a new department, the State Internet Information Office (with the involvement of the State Council Information Office, the MIIT, and the Ministry of Public Security). The primary role of this new agency is to facilitate the policy-making and legislative development in this field, to direct and coordinate with the relevant departments in connection with online content administration and to deal with cross-ministry regulatory matters in relation to the internet industry.

        We are required to obtain and maintain various licenses and permits and fulfill registration and filing requirements in order to conduct and operate our business. If these new laws and regulations are promulgated, additional licenses may be required for our operations. If our operations do not comply with these new regulations at the time they become effective, or if we fail to obtain any licenses required under these new laws and regulations, we could be subject to penalties.

        The Circular on Strengthening the Administration of Foreign Investment in an Operation of Value-added Telecommunications Business, issued by the MIIT in July 2006, prohibits domestic telecommunication service providers from leasing, transferring or selling telecommunications business

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operating licenses to any foreign investor in any form, or providing any resources, sites or facilities to any foreign investor for their illegal operation of a telecommunications business in China. According to this circular, either the holder of a value-added telecommunication services operation permit or its shareholders must directly own the domain names and trademarks used by such license holders in their provision of value-added telecommunication services. The circular also requires each license holder to have the necessary facilities, including servers, for its approved business operations and to maintain such facilities in the regions covered by its license. If an ICP license holder fails to comply with the requirements and also fails to remediate such non-compliance within a specified period of time, the MIIT or its local counterparts have the discretion to take administrative measures against such license holder, including revoking its ICP license. Currently, Dasheng Zhixing, our PRC consolidated VIE, holds an ICP license and operates our website. Dasheng Zhixing owns the relevant domain names and registered trademarks and has the necessary personnel to operate such website.

        The interpretation and application of existing PRC law, regulations and policies and possible new laws, regulations or policies relating to the internet industry have created substantial uncertainties regarding the legality of existing and future foreign investments in, and the businesses and activities of, internet businesses in China, including our business. We cannot assure you that we have obtained all the permits or licenses required for conducting our business in China or will be able to maintain our existing licenses or obtain new ones.

Failure to make adequate contributions to various employee benefit plans as required by PRC regulations may subject us to penalties.

        Companies operating in China are required to participate in various government sponsored employee benefit plans, including certain social insurance, housing funds and other welfare-oriented payment obligations, and contribute to the plans in amounts equal to certain percentages of salaries, including bonuses and allowances, of employees up to a maximum amount specified by the local government from time to time at locations where they operate their businesses. The requirement of employee benefit plans has not been implemented consistently by the local governments in China given the different levels of economic development in different locations. Dasheng Zhixing, our PRC operating entity and Dasheng Online, our PRC subsidiary, have not made adequate employee benefit payments and we have recorded accruals for estimated underpaid amounts of RMB2.2 million, RMB12.3 million, RMB46.8 million (US$7.2 million) and 56.6 million (US$8.8 million) as of December 31, 2013, 2014 and 2015 and March 31, 2016, respectively, in our financial statements. Our failure in making contributions to various employee benefit plans and in complying with applicable PRC labor-related laws may subject us to late payment penalties. We may be required to make up the contributions for these plans as well as to pay late fees and fines. If we are subject to late fees or fines in relation to the underpaid employee benefits, our financial condition and results of operations may be adversely affected.

The enforcement of the PRC Labor Contract Law and other labor-related regulations in the PRC may adversely affect our business and our results of operations.

        The PRC Labor Contract Law became effective and was implemented on January 1, 2008, which was amended on December 28, 2012. It has reinforced the protection of employees who, under the PRC Labor Contract Law, have the right, among others, to have written labor contracts, to enter into labor contracts with no fixed terms under certain circumstances, to receive overtime wages and to terminate or alter terms in labor contracts. According to the PRC Social Insurance Law, which became effective on July 1, 2011, and the Administrative Regulations on the Housing Funds, Companies operating in China are required to participate in pension insurance, work-related injury insurance, medical insurance, unemployment insurance, maternity insurance and housing funds plans, and the employers must pay all or a portion of the social insurance premiums and housing funds for their employees.

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        As a result of these laws and regulations designed to enhance labor protection, we expect our labor costs will continue to increase. In addition, as the interpretation and implementation of these laws and regulations are still evolving, our employment practice may not at all times be deemed in compliance with the new laws and regulations. If we are subject to severe penalties or incur significant liabilities in connection with labor disputes or investigations, our business and results of operations may be adversely affected.

Regulation and censorship of information disseminated over the internet in China may adversely affect our business and reputation and subject us to liability for information displayed on our website.

        The PRC government has adopted regulations governing internet access and the distribution of news and other information over the internet. Under these regulations, internet content providers and internet publishers are prohibited from posting or displaying over the internet content that, among other things, violates PRC laws and regulations, impairs the national dignity of China, or is reactionary, obscene, superstitious, fraudulent or defamatory. Failure to comply with these requirements may result in the revocation of licenses to provide internet content and other licenses, and the closure of the concerned websites. The website operator may also be held liable for such censored information displayed on or linked to the websites. If our website is found to be in violation of any such requirements, we may be penalized by relevant authorities, and our operations or reputation could be adversely affected.

The operation of Dasheng Zhixing may be deemed by relevant PRC goverment authorits to be beyond its authorized business scope. If the relevant PRC government authorities take actions against Dasheng Zhixing, our business and operations could be materially and adversely affected.

        The principal regulations governing private education in China consist of the Education Law of the PRC, the Law for Promoting Private Education, or Private Education Law, and the Implementation Rules for the Law for Promoting Private Education. Under these PRC laws and regulations, private education is deemed a public welfare undertaking in China, and it is provided in these PRC laws and regulations that no organization or individual may establish or operate a private school, which is broadly defined as schools or other educational organizations established by social organizations or individuals using non-governmental funds for commercial purposes, expect for "reasonable returns." It is also provided in these PRC laws and resolutions that, to establish a private school, one shall first apply with the relevant authorities in charge of education or labor and social welfare, as applicable, for a private school operating permit, and shall then register the private school with the Ministry of Civil Affairs, or MCA, or its local counterparts as a private non-enterprise institution after successfully obtaining a private school operating permit. These PRC laws and regulations on private education generally apply to the establishment and operation of all private schools, except for the commercial private training institutions registered with the SAIC and its local counterparts, as the Private Education Law explicitly stipulates that the regulations applicable to commercial private training institutions shall be formulated by the State Council separately. As of the date of this prospectus, no specific regulations on commercial private training institutions registered with the SAIC and its local counterparts has been promulgated by the State Council, though the State Council has launched a pilot reform programme on classification management of private schools in Shanghai, Zhejiang, Shenzhen and Jilin Huaqiao Foreign Language School in 2010, and the local government of certain pilot areas, such as Shanghai, has accordingly promulgated specific local regulations to clarify the requirement and procedures for establishing and operating commercial training institutions. However, as of the date of this prospectus, no explicit local rules or guideline on registration of commercial training institutions have been promulgated in Beijing, where our PRC consolidated VIE, Dasheng Zhixing, is incorporated. See "Regulation—Regulation Relating to Private Education."

        We operate an online platform that provides online tutoring programs to students through the internet, and both of our PRC subsidiary and our PRC consolidated VIE are registered with Beijing AIC as commercial enterprises. As such, we believe the provisions of the Private Education Law and its

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implementing rules, including without limitation, the requirement for obtaining a private school operating permit, are not applicable to us. However, we cannot assure you that the competent PRC governmental authorities will not ultimately take a view contrary to our opinion. Moreover, because there is no further official or publicly-available interpretation of the definition of "commercial private training", there are uncertainties with regard to whether our business currently conducted in PRC will be deemed by the relevant PRC govermental authorities to be "commercial private training" as defined under the relevant PRC laws and regulations. If our business conducted in PRC is deemed as commercial private training business, we may be required to register our PRC entity as a commercial private training institution with education or training-related items included into its approved business scope. Dasheng Zhixing is registered with Beijing AIC as a limited company, and its current registered business scope only includes "education consulting" and "computer technology training," without "training," "English training," "language training" or any other education or training-related items. Dasheng Zhixing's application to expand its business scope to include education or training-related items was rejected by Beijing AIC on the basis that no explicit rules or guidelines on registration of commercial training institution have been promulgated in Beijing. We will continue to make an application with Beijing AIC to expand our business scope but we cannot assure you that our application will be accepted by Beijing AIC in a timely fashion or at all. As of the date of this prospectus, we have not received any notice of warning or been subject to penalties or other disciplinary action from the relevant governmental authorities regarding the conducting of our business beyond authorized business scope or without any approvals and permits. However, we cannot assure you that we will not be subject to any penalties in the future. If the relevant PRC government authorities discover or determine that Dasheng Zhixing operates beyond its authorized business scope, Dasheng Zhixing may be ordered to complete the registration for change of business scope within a given period, failing which Dasheng Zhixing is subject to a one-time fine of RMB10,000 to RMB100,000, or may be ordered to cease its operation if the relevant authorities determine that Dasheng Zhixing is operating without any approval or permit required.

We face risks and uncertainties with respect to the licensing requirement for Internet audio-video programs.

        On December 20, 2007, the State Administration of Press Publication Radio Film and Television, or SAPPRFT, and the Ministry of Industry and Information Technology, or MIIT, jointly promulgated the Administrative Measures Regarding Internet Audio-Video Program Services, or the Internet Audio-Video Program Measures, which became effective on January 31, 2008. Among other things, the Internet Audio-Video Program Measures stipulate that no entities or individuals may provide Internet audio-video program services without a License for Online Transmission of Audio-Visual Programs issued by SAPPRFT or its local bureaus or completing the relevant registration with SAPPRFT or its local bureaus, and only state-owned or state-controlled entities are eligible to apply for a License for Online Transmission of Audio-Visual Programs. In a press conference joinly held by the SAPPRFT and MIIT in February 2008 to answer questions relating to the Internet Audio-Video Program Measures, the SAPPRFT and MIIT clarified that those providers of internet audio-visual program services who engaged in such services prior to the promulgation of the Internet Audio-Video Program Measure may re-register and continue their operation of internet audio-visual program services so long as those providers did not violate the relevant laws and regulations in the past, regardless whether they are state-owned or state-controlled entities or not, but any other entities intend to provid internet audio-visual program services shall comply with all requiremnets specified in the Internet Audio-Video Program Measures. On April 1, 2010, SAPPRFT promulgated the Provisional Implementation of the Tentative Categories of Internet Audio-Visual Program Services, or the Categories, which clarified the scope of Internet audio-video programs services. According to the Categories, there are four categories of Internet audio-visual program services which are further divided into seventeen sub-categories. The third sub-category to the second category covers the making and editing of certain specialized audio-video programs concerning, among other things, educational content, and broadcasting such content to the general public online. However, there are still

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significant uncertainties relating to the interpretation and implementation of the Internet Audio-Video Program Measures, in particular, the scope of "internet audio-video programs."

        We do not offer recorded audio-video lectures to either general public or our enrolled students. In the course of delivering the lessons, the foreign teachers and enrolled students communicate and interact live with each other, mostly on one-on-one basis, by ultilizing our Air Class platform or third party-operated platforms such as QQ and Skype. The audio and video data are tramsmited through the relevant platform between the specific recipients instantly without any further redaction. We believe the limited scope of our audience and the nature of the raw data we transmit distinguishes us from general providers of internet audio-visual program services, such as the operator of online video websites, and the provision of the Audio-Visual Program Provisions are not applicable with regard to our offering of the lessons. However, we cannot assure you that the competent PRC government authorities will not ultimately take a view contrary to our opinion. In addition, as supplementary course materials, we offer certain audio-video contents on our websites and mobile apps for the review of all registered members, and meanwhile, one feature of our mobile app DuoShuoYingYu is to offer all registered members a platform to record and post their audio messages to discuss certain topics in English with their peer English learners. If the governmental authorities determine that our relevant activities fall within the definition of "internet audio-video program service" under the Audio-Visual Program Provisions, we may be required to obtain the License for Disseminating Audio-Video Programs through Information Network. If this occurs, we may not be able to obtain such license and we may become subject to penalties, fines, legal sanctions or an order to suspend our use of audio-video content. On March 7, 2016, Dasheng Zhixing received a Decision on Administrative Penalty issued by the Beijing Cultural Market Administrative Law Enforcement Agency, according to which Dasheng Zhixing has been given a warning and a penalty of RMB 5,000 for posting video clips on our website without required licenses. We have taken various corrective measures as required by the authorities, such as deleting the video clips in question, blocking video upload function in our online forum, and engaging a qualified third party to host certain of the video clips we use on our websites. However, we cannot assure you the corrective measures we have taken will be deemed adequate by the authorities and we will not be subject to any other penalties or legal sanctions in the future for our use of audio or video contents on our websites.

We are required to obtain various operating licenses and permits and to make registrations and filings for our business operations in China; failure to comply with these requirements may materially adversely affect our business and results of operations.

        The internet industry in China is highly regulated by the PRC government. See "Regulation—PRC Regulation." We are required to obtain and maintain various licenses and permits and fulfill registration and filing requirements in order to conduct and operate our business currently carried out, and we may be required to obtained additional licenses or permits for our operations as the interpretation and implementation of current PRC laws and regulations are still evolving, and new laws and regulations may also be promulgated. We currently, through our PRC variable interest entity, Dasheng Zhixing, hold an ICP license for our three websites, which is valid through September 15, 2016 and is subject to annual review. Dasheng Zhixing, however, may be required to obtain additional licenses. For example, the contents we use on our websites or mobile apps, including the course materials and video-audio contents we licensed from third parties, may be deemed "Internet cultural products", and our use of those contents may be regarded as "Internet cultural activities", thus we may be required to obtain an Internet Culture Business Operating License for provision of those contents through our online platform as currently there is no further official or publicly-available interpretation of those definitions. Also, we may be required to obtain a Publication Business Operating License for distribution of course books or other course materials, including electronical version, to our enrolled students. We currently do not hold an Internet Culture Business Operating License or a Publication Business Operating License, and we are in the process of applying for those licenses. In addition, our providing content through our online platform may be regarded as "online publishing" and may thus subject us to the requirement of obtaining an Online

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Publishing License. If Dasheng Zhixing fails to obtain or maintain any of the required licenses or approvals, its continued business operations in the Internet industry may subject it to various penalties, such as confiscation of illegal revenues, fines and the discontinuation or restriction of its operations. Any such disruption in the business operations of our affiliated entities will materially and adversely affect our business, financial condition and results of operations.

Changes in China's economic, political or social conditions or government policies could have a material adverse effect on our business and operations.

        A significant portion of our business operations is conducted in China and all of our sales are made in China. Accordingly, our business, financial condition, results of operations and prospects may be influenced to a significant degree by political, economic and social conditions in China generally and by continued economic growth in China as a whole.

        China's economy differs from the economies of most developed countries in many respects, including the level of government involvement, level of development, growth rate, control of foreign exchange and allocation of resources. Although the PRC government has implemented measures since the late 1970s emphasizing the utilization of market forces for economic reform, the reduction of state ownership of productive assets, and the establishment of improved corporate governance in business enterprises, a substantial portion of productive assets in China is still owned by the PRC government. In addition, the PRC government continues to play a significant role in regulating industry development by imposing industrial policies. The PRC government also exercises significant control over the PRC economic growth through allocating resources, controlling payment of foreign currency-denominated obligations, setting monetary policy, and providing preferential treatment to particular industries or companies.

        While China's economy has experienced significant growth over the past decades, growth has been uneven, both geographically and among various sectors of the economy, and the rate of growth has been slowing. Some of the governmental measures may benefit the overall Chinese economy, but may have a negative effect on us. For example, our financial condition and results of operations may be adversely affected by government control over capital investments or changes in tax regulations. Any stimulus measures designed to boost the Chinese economy may contribute to higher inflation, which could adversely affect our results of operations and financial condition. For example, certain operating costs and expenses, such as employee compensation and office operating expenses, may increase as a result of higher inflation.

A severe or prolonged downturn in the global or PRC economy could materially and adversely affect our business and our financial condition.

        The global financial markets experienced significant disruptions in 2008 and the United States, Europe and other economies went into recession. The recovery from the lows of 2008 and 2009 was uneven and it is facing new challenges, including the escalation of the European sovereign debt crisis since 2011 and the slowdown of the PRC economy since 2012. There is considerable uncertainty over the long-term effects of the expansionary monetary and fiscal policies that have been adopted by the central banks and financial authorities of some of the world's leading economies. There have also been concerns over unrest in Ukraine, the Middle East and Africa, which have resulted in volatility in oil and other markets. In addition, there have been concerns about the territorial disputes involving China in Asia and the economic effects of such disputes. Economic conditions in China are sensitive to global economic conditions. Although the PRC economy has grown significantly in the past decade, that growth may not continue, as evidenced by the slowing of the growth of the PRC economy since 2012. Any severe or prolonged slowdown in the PRC economy may materially and adversely affect our business, results of operations and financial condition. In addition, continued turbulence in the international markets may adversely affect our ability to access capital markets to meet liquidity needs.

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PRC regulations relating to foreign exchange registration of overseas investment by PRC residents may subject our PRC resident beneficial owners or our PRC subsidiary to liability or penalties, limit our ability to inject capital into these subsidiaries, limit PRC subsidiary's ability to increase their registered capital or distribute profits to us, or may otherwise adversely affect us.

        On July 4, 2014, the State Administration of Foreign Exchange, or SAFE, promulgated the Circular on Relevant Issues Relating to Domestic Resident's Investment and Financing and Roundtrip Investment through Special Purpose Vehicles, or SAFE Circular 37, which replaced the former Notice on Relevant Issues Concerning Foreign Exchange Administration for PRC Residents to Engage in Financing and Inbound Investment via Overseas Special Purpose Vehicles (generally known as SAFE Circular 75) promulgated by SAFE on October 21, 2005. On February 13, 2015, SAFE further promulgated the Circular on Further Simplifying and Improving the Administration of the Foreign Exchange Concerning Direct Investment, or SAFE Circular 13, which took effect on June 1, 2015. This SAFE Circular 13 has amended SAFE Circular 37 by requiring PRC residents or entities to register with qualified banks rather than SAFE or its local branch in connection with their establishment or control of an offshore entity established for the purpose of overseas investment or financing.

        These circulars require PRC residents to register with qualified banks in connection with their direct establishment or indirect control of an offshore entity, for the purpose of overseas investment and financing, with such PRC residents' legally owned assets or equity interests in domestic enterprises or offshore assets or interests, which is referred to in SAFE Circular 37 as a "special purpose vehicle." These circulars further require amendment to the registration in the event of any significant changes with respect to the special purpose vehicle, such as an increase or decrease of capital contributed by PRC residents, share transfer or exchange, merger, division or other material events. In the event that a PRC resident holding interests in a special purpose vehicle fails to complete the required SAFE registration, the PRC subsidiary of that special purpose vehicle may be prohibited from making profit distributions to the offshore parent and from carrying out subsequent cross-border foreign exchange activities, and the special purpose vehicle may be restricted in its ability to contribute additional capital into its PRC subsidiary. Furthermore, failure to comply with the various SAFE registration requirements described above could result in liability under PRC law for evasion of foreign exchange controls.

        Mr. Jack Jiajia Huang and Ms. Ting Shu, who directly or indirectly hold shares in our Cayman Islands holding company and who are known to us as being PRC residents have completed the initial foreign exchange registrations and are in the process of updating their registrations required in connection with our recent corporate restructuring. However, we may not at all times be fully aware or informed of the identities of all our shareholders or beneficial owners that are required to make such registrations, and we may not always be able to compel them to comply with all relevant foreign exchange regulations. As a result, we cannot assure you that all of our shareholders or beneficial owners who are PRC residents will at all times comply with, or in the future make or obtain any applicable registrations or approvals required by all relevant foreign exchange regulations. The failure or inability of such individuals to comply with the registration procedures set forth in these regulations may subject us to fines or legal sanctions, restrictions on our cross-border investment activities or our PRC subsidiary's ability to distribute dividends to, or obtain foreign-exchange-dominated loans from, our company, or prevent us from making distributions or paying dividends. As a result, our business operations and our ability to make distributions to you could be materially and adversely affected.

        Furthermore, as these foreign exchange regulations are still relatively new and their interpretation and implementation has been constantly evolving, it is unclear how these regulations, and any future regulation concerning offshore or cross-border transactions, will be interpreted, amended and implemented by the relevant government authorities. We cannot predict how these regulations will affect our business operations or future strategy. In addition, if we decide to acquire a PRC domestic company, we cannot assure you that we or the owners of such company, as the case may be, will be able to obtain the necessary approvals or complete the necessary filings and registrations required by the foreign exchange regulations. This may restrict our ability to implement our acquisition strategy and could adversely affect our business and prospects.

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PRC regulation on loans to, and direct investment in, PRC entities by offshore holding companies and governmental control in currency conversion may delay or prevent us from using the proceeds of this offering to make loans to our PRC subsidiary and PRC consolidated VIE or make additional capital contributions to our PRC subsidiary, which could materially and adversely affect our liquidity and our ability to fund and expand our business.

        We are an offshore holding company conducting our operations in China through our PRC subsidiary, Dasheng Online. We may make loans to our PRC subsidiary and PRC consolidated VIE subject to the approval from governmental authorities and limitation of amount, or we may make additional capital contributions to our PRC subsidiary.

        Any loans to our PRC subsidiary, which is treated as a foreign-invested enterprise under PRC law, are subject to PRC regulations and foreign exchange loan registrations. For example, loans by us to our PRC subsidiary to finance its activities cannot exceed statutory limits and must be registered with the local counterpart of the SAFE. The statutory limit for the total amount of foreign debts of a foreign-invested company is the difference between the amount of total investment as approved by the Ministry of Commerce or its local counterpart and the amount of registered capital of such foreign-invested company. The difference between the total amount of investment and the registered capital for Dasheng Online is US$10 million. We may also decide to finance our PRC subsidiary by means of capital contributions. Our capital contributions to our PRC subsidiary must be approved by the Ministry of Commerce or its local counterpart. We cannot assure you that we will be able to complete the necessary registration or obtain the necessary approval on a timely basis, or at all. If we fail to complete the necessary registration or obtain the necessary approval, our ability to make loans or equity contributions to our PRC subsidiary may be negatively affected, which could adversely affect our PRC subsidiary's liquidity and its ability to fund its working capital and expansion projects and meet its obligations and commitments.

        On August 29, 2008, SAFE promulgated the Circular on the Relevant Operating Issues Concerning the Improvement of the Administration of the Payment and Settlement of Foreign Currency Capital of Foreign-Invested Enterprises, or SAFE Circular 142, regulating the conversion by a foreign-invested enterprise of foreign currency registered capital into RMB by restricting how the converted RMB may be used. SAFE Circular 142 provides that the RMB capital converted from foreign currency registered capital of a foreign-invested enterprise may only be used for purposes within the business scope approved by the applicable governmental authority and may not be used for equity investments within the PRC unless otherwise provided by law. In addition, SAFE strengthened its oversight of the flow and use of the RMB capital converted from foreign currency registered capital of a foreign-invested company. The use of such RMB capital may not be altered without SAFE approval, and such RMB capital may not in any case be used to repay RMB loans if the proceeds of such loans have not been used. Violations of SAFE Circular 142 could result in severe monetary or other penalties. On July 4, 2014, SAFE issued the Circular of the SAFE on Relevant Issues Concerning the Pilot Reform in Certain Areas of the Administrative Method of the Conversion of Foreign Exchange Funds by Foreign-invested Enterprises, or SAFE Circular 36, which launched the pilot reform of administration regarding conversion of foreign currency registered capitals of foreign-invested enterprises in 16 pilot areas. According to SAFE Circular 36, some of the restrictions under SAFE Circular 142 will not apply to the settlement of the foreign exchange capitals of an ordinary foreign-invested enterprise in the pilot areas, and such foreign-invested enterprise is permitted to use Renminbi converted from its foreign-currency registered capital to make equity investments in the PRC within and in accordance with the authorized business scope of such foreign-invested enterprises, subject to certain registration and settlement procedure as set forth in SAFE Circular 36. As this circular is relatively new, there remains uncertainty as to its interpretation and application and any other future foreign exchange related rules. On March 30, 2015, SAFE promulgated Circular on Reforming the Management Approach regarding the Settlement of Foreign Exchange Capital of Foreign-invested Enterprises, or SAFE Circular 19, to expand the reform nationwide. SAFE Circular 19 came into force and replaced both SAFE Circular 142 and SAFE Circular 36 on June 1, 2015. However, SAFE Circular 19 continues to prohibit a foreign-invested enterprise from, among other things, using RMB funds converted

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from its foreign exchange capitals for expenditure beyond its authorized business scope, providing entrusted loans or repaying loans between non-financial enterprises. Violations of these Circulars could result in severe monetary or other penalties. These circulars may significantly limit our ability to use RMB converted from the net proceeds of this offering to fund the establishment of new entities in China by our PRC subsidiary, to invest in or acquire any other PRC companies through our PRC subsidiary, or to establish new consolidated VIEs in the PRC.

        In light of the various requirements imposed by PRC regulations on loans to, and direct investment in, PRC entities by offshore holding companies, we cannot assure you that we will be able to complete the necessary government registrations or obtain the necessary government approvals on a timely basis, if at all, with respect to future loans by us to our PRC subsidiary or PRC consolidated VIE or with respect to future capital contributions by us to our PRC subsidiary. If we fail to complete such registrations or obtain such approvals, our ability to use the proceeds from this offering and to capitalize or otherwise fund our PRC operations may be negatively affected, which could materially and adversely affect our liquidity and our ability to fund and expand our business.

Under the PRC Enterprise Income Tax Law, we may be classified as a PRC "resident enterprise" for PRC enterprise income tax purposes. Such classification would likely result in unfavorable tax consequences to us and our non-PRC shareholders and has a material adverse effect on our results of operations and the value of your investment.

        Under the PRC Enterprise Income Tax Law, or the EIT Law, that became effective in January, 2008, an enterprise established outside the PRC with "de facto management bodies" within the PRC is considered a "resident enterprise" for PRC enterprise income tax purposes and is generally subject to a uniform 25% enterprise income tax rate on its worldwide income. Under the implementation rules to the EIT Law, a "de facto management body" is defined as a body that has material and overall management and control over the manufacturing and business operations, personnel and human resources, finances and properties of an enterprise. In addition, a circular, known as SAT Circular 82, issued in April 2009 by the State Administration of Taxation, or the SAT, specifies that certain offshore incorporated enterprises controlled by PRC enterprises or PRC enterprise groups will be classified as PRC resident enterprises if the following are located or resident in the PRC: senior management personnel and departments that are responsible for daily production, operation and management; financial and personnel decision making bodies; key properties, accounting books, company seal, and minutes of board meetings and shareholders' meetings; and half or more of the senior management or directors having voting rights. Further to SAT Circular 82, the SAT issued a bulletin, known as SAT Bulletin 45, which took effect in September 2011, to provide more guidance on the implementation of SAT Circular 82 and clarify the reporting and filing obligations of such "Chinese-controlled offshore incorporated resident enterprises." SAT Bulletin 45 provides procedures and administrative details for the determination of resident status and administration on post-determination matters. Although both SAT Circular 82 and SAT Bulletin 45 only apply to offshore enterprises controlled by PRC enterprises or PRC enterprise groups, not those controlled by PRC individuals or foreign individuals, the determining criteria set forth in SAT Circular 82 and SAT Bulletin 45 may reflect the SAT's general position on how the "de facto management body" test should be applied in determining the tax resident status of offshore enterprises, regardless of whether they are controlled by PRC enterprises, PRC enterprise groups or by PRC or foreign individuals.

        We do not believe that COE meets all of the conditions above thus we do not believe that COE is a PRC resident enterprise, though a substantial majority of the members of our management team as well as the management team of our offshore holding company are located in China. However, if the PRC tax authorities determine that COE is a PRC resident enterprise for PRC enterprise income tax purposes, a number of unfavorable PRC tax consequences could follow. First, we will be subject to the uniform 25% enterprise income tax on our world-wide income, which could materially reduce our net income. In addition, we will also be subject to PRC enterprise income tax reporting obligations.

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        Finally, dividends payable by us to our investors and gains on the sale of our shares may become subject to PRC withholding tax, at a rate of 10% in the case of non-PRC enterprises or 20% in the case of non-PRC individuals (in each case, subject to the provisions of any applicable tax treaty), if such gains are deemed to be from PRC sources. It is unclear whether non-PRC shareholders of our company would be able to claim the benefits of any tax treaties between their country of tax residence and the PRC in the event that we are treated as a PRC resident enterprise. Any such tax may reduce the returns on your investment in the ADSs.

Enhanced scrutiny over acquisition transactions by the PRC tax authorities may have a negative impact on potential acquisitions we may pursue in the future.

        Pursuant to the Notice on Strengthening Administration of Enterprise Income Tax for Share Transfers by Non-PRC Resident Enterprises, or SAT Circular 698, issued by the SAT on December 10, 2009, where a foreign investor transfers the equity interests of a resident enterprise indirectly via disposition of the equity interests of an overseas holding company, or an "indirect transfer," and such overseas holding company is located in a tax jurisdiction that (i) has an effective tax rate less than 12.5% or (ii) does not tax foreign income of its residents, the foreign investor shall report the indirect transfer to the competent tax authority. The PRC tax authority will examine the true nature of the indirect transfer, and if the tax authority considers that the foreign investor has adopted an "abusive arrangement" in order to avoid PRC tax, it may disregard the existence of the overseas holding company and re-characterize the indirect transfer and as a result, gains derived from such indirect transfer may be subject to PRC withholding tax at a rate of up to 10%.

        On February 3, 2015, the SAT issued the Announcement of the State Administration of Taxation on Several Issues Concerning the Enterprise Income Tax on Indirect Property Transfer by Non-Resident Enterprises, or SAT Bulletin 7, to supersede existing provisions in relation to the "indirect transfer" as set forth in Circular 698, while the other provisions of Circular 698 remain in force. Pursuant to SAT Bulletin 7, where a non-resident enterprise indirectly transfers properties such as equity in PRC resident enterprises without any justifiable business purposes and aiming to avoid the payment of enterprise income tax, such indirect transfer must be reclassified as a direct transfer of equity in PRC resident enterprise. To assess whether an indirect transfer of PRC taxable properties has reasonable commercial purposes, all arrangements related to the indirect transfer must be considered comprehensively and factors set forth in SAT Bulletin 7 must be comprehensively analyzed in light of the actual circumstances. SAT Bulletin 7 also provides that, where a non-PRC resident enterprise transfers its equity interests in a resident enterprise to its related parties at a price lower than the fair market value, the competent tax authority has the power to make a reasonable adjustment to the taxable income of the transaction.

        There is little practical experience regarding the application of SAT Bulletin 7 because it was newly issued in February 2015. During the effective period of SAT Circular 698, some intermediary holding companies were actually looked through by the PRC tax authorities, and consequently the non-PRC resident investors were deemed to have transferred the PRC subsidiary and PRC corporate taxes were assessed accordingly. It is possible that we or our non-PRC resident investors may become at risk of being taxed under SAT Bulletin 7 and may be required to expend valuable resources to comply with SAT Bulletin 7 or to establish that we or our non-PRC resident investors should not be taxed under SAT Bulletin 7, which may have an adverse effect on our financial condition and results of operations or such non-PRC resident investors' investment in us.

Failure to comply with PRC regulations regarding the registration requirements for employee share ownership plans or share option plans may subject the PRC plan participants or us to fines and other legal or administrative sanctions.

        In February 2012, SAFE promulgated the Notices on Issues Concerning the Foreign Exchange Administration for Domestic Individuals Participating in Stock Incentive Plans of Overseas Publicly-Listed Companies, or SAFE Circular 7, replacing the previous rules issued by SAFE in March 2007. Under the

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SAFE Circular 7 and other relevant rules and regulations, PRC residents who participate in a stock incentive plan in an overseas publicly-listed company are required to register with SAFE or its local branches and complete certain other procedures. Participants of a stock incentive plan who are PRC residents must retain a qualified PRC agent, which could be a PRC subsidiary of the overseas publicly listed company or another qualified institution selected by the PRC subsidiary, to conduct the SAFE registration and other procedures with respect to the stock incentive plan on behalf of its participants. The participants must also retain an overseas entrusted institution to handle matters in connection with their exercise of stock options, the purchase and sale of corresponding stocks or interests and fund transfers. In addition, the PRC agent is required to amend the SAFE registration with respect to the stock incentive plan if there is any material change to the stock incentive plan, the PRC agent or the overseas entrusted institution or other material changes. See "Regulation—Regulations on Stock Incentive Plans." We and our PRC employees who have been granted share options and restricted shares will be subject to these regulations upon the completion of this offering. Failure of our PRC share option holders or restricted shareholders to complete their SAFE registrations may subject these PRC residents to fines and legal sanctions and may also limit our ability to contribute additional capital into our PRC subsidiary, limit our PRC subsidiary's ability to distribute dividends to us, or otherwise materially adversely affect our business.

Our PRC subsidiary is subject to restrictions on paying dividends or making other payments to us, which may restrict our ability to satisfy our liquidity requirements.

        We are a holding company incorporated in the Cayman Islands. We may need dividends and other distributions on equity from our PRC subsidiary to satisfy our liquidity requirements. Current PRC regulations permit our PRC subsidiary to pay dividends to us only out of their accumulated profits, if any, determined in accordance with PRC accounting standards and regulations. In addition, our PRC subsidiary is required to set aside at least 10% of their respective accumulated profits each year, if any, to fund certain reserve funds until the total amount set aside reaches 50% of their respective registered capital. Our PRC subsidiary may also allocate a portion of its after-tax profits based on PRC accounting standards to employee welfare and bonus funds at their discretion. These reserves are not distributable as cash dividends. Furthermore, if our PRC subsidiary incurs debt on their own behalf in the future, the instruments governing the debt may restrict their ability to pay dividends or make other payments to us. In addition, the PRC tax authorities may require us to adjust our taxable income under the contractual arrangements we currently have in place in a manner that would materially and adversely affect our PRC subsidiary's ability to pay dividends and other distributions to us. Any limitation on the ability of our subsidiary to distribute dividends to us or on the ability of our PRC consolidated VIE to make payments to us may restrict our ability to satisfy our liquidity requirements.

        In addition, the EIT Law, and its implementation rules provide that a withholding tax rate of up to 10% will be applicable to dividends payable by Chinese companies to non-PRC-resident enterprises unless otherwise exempted or reduced according to treaties or arrangements between the PRC central government and governments of other countries or regions where the non-PRC-resident enterprises are incorporated.

Governmental control of currency conversion may affect the value of your investment.

        The PRC government imposes controls on the convertibility of the RMB into foreign currencies and, in certain cases, the remittance of currency out of China. We receive substantially all of our revenues in RMB. Under our current corporate structure, our company in the Cayman Islands may rely on dividend payments from our PRC subsidiary to fund any cash and financing requirements we may have. Under existing PRC foreign exchange regulations, payments of current account items, such as profit distributions and trade and service-related foreign exchange transactions, can be made in foreign currencies without prior approval from SAFE by complying with certain procedural requirements. Therefore, our PRC subsidiary in China is able to pay dividends in foreign currencies to us without prior approval from SAFE,

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subject to the condition that the remittance of such dividends outside of the PRC complies with certain procedures under PRC foreign exchange regulation, such as the overseas investment registrations by our shareholders or the ultimate shareholders of our corporate shareholders who are PRC residents. But approval from or registration with appropriate government authorities is required where RMB is to be converted into foreign currency and remitted out of China to pay capital expenses such as the repayment of loans denominated in foreign currencies. The PRC government may also at its discretion restrict access in the future to foreign currencies for current account transactions. If the foreign exchange control system prevents us from obtaining sufficient foreign currencies to satisfy our foreign currency demands, we may not be able to pay dividends in foreign currencies to our shareholders, including holders of our ADSs.

The approval of the China Securities Regulatory Commission may be required in connection with this offering under a regulation adopted in August 2006, and, if required, we cannot assure you that we will be able to obtain such approval.

        The Regulations on Mergers and Acquisitions of Domestic Companies by Foreign Investors, or the M&A Rules, adopted by six PRC regulatory agencies in 2006 and amended in 2009, requires an overseas special purpose vehicle formed for listing purposes through acquisitions of PRC domestic companies and controlled by PRC companies or individuals to obtain the approval of the China Securities Regulatory Commission, or the CSRC, prior to the listing and trading of such special purpose vehicle's securities on an overseas stock exchange. In September 2006, the CSRC published a notice on its official website specifying documents and materials required to be submitted to it by a special purpose vehicle seeking CSRC approval of its overseas listings. The application of the M&A Rules remains unclear. Currently, there is no consensus among leading PRC law firms regarding the scope and applicability of the CSRC approval requirement.

        Our PRC counsel, Han Kun Law Offices, has advised us based on their understanding of the current PRC law, rules and regulations that the CSRC's approval is not required for the listing and trading of our ADSs on the [NYSE/NASDAQ Global Market] in the context of this offering, given that:

    the CSRC currently has not issued any definitive rule or interpretation concerning whether offerings like ours under this prospectus are subject to this regulation;

    we established our PRC subsidiary, Dasheng Online, by means of direct investment rather than by merger with or acquisition of PRC domestic companies; and

    no provision in this regulation clearly classifies contractual arrangements as a type of transaction subject to its regulation.

        However, our PRC legal counsel has further advised us that there remains some uncertainty as to how the M&A Rules will be interpreted or implemented in the context of an overseas offering and its opinions summarized above are subject to any new laws, rules and regulations or detailed implementations and interpretations in any form relating to the M&A Rules. We cannot assure you that relevant PRC governmental agencies, including the CSRC, would reach the same conclusion as we do. If it is determined that CSRC approval is required for this offering, we may face sanctions by the CSRC or other PRC regulatory agencies for failure to seek CSRC approval for this offering. These sanctions may include fines and penalties on our operations in the PRC, limitations on our operating privileges in the PRC, delays in or restrictions on the repatriation of the proceeds from this offering into the PRC, restrictions on or prohibition of the payments or remittance of dividends by our China subsidiary, or other actions that could have a material and adverse effect on our business, financial condition, results of operations, reputation and prospects, as well as the trading price of our ADSs. The CSRC or other PRC regulatory agencies may also take actions requiring us, or making it advisable for us, to halt this offering before the settlement and delivery of the ADSs that we are offering. Consequently, if you engage in market trading or other activities in anticipation of and prior to the settlement and delivery of the ADSs we are offering, you would be doing so at the risk that the settlement and delivery may not occur.

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The M&A Rules and certain other PRC regulations establish complex procedures for some acquisitions of Chinese companies by foreign investors, which could make it more difficult for us to pursue growth through acquisitions in China.

        The M&A Rules discussed in the preceding risk factor and recently adopted regulations and rules concerning mergers and acquisitions established additional procedures and requirements that could make merger and acquisition activities by foreign investors more time consuming and complex. For example, the M&A Rules require that the Ministry of Commerce be notified in advance of any change-of-control transaction in which a foreign investor takes control of a PRC domestic enterprise, if (i) any important industry is concerned, (ii) such transaction involves factors that have or may have impact on the national economic security, or (iii) such transaction will lead to a change in control of a domestic enterprise which holds a famous trademark or PRC time-honored brand. Mergers, acquisitions or contractual arrangements that allow one market player to take control of or to exert decisive impact on another market player must also be notified in advance to the Ministry of Commerce when the threshold under the Provisions on Thresholds for Prior Notification of Concentrations of Undertakings, or the Prior Notification Rules, issued by the State Council in August 2008 is triggered. In addition, the security review rules issued by the Ministry of Commerce that became effective in September 2011 specify that mergers and acquisitions by foreign investors that raise "national defense and security" concerns and mergers and acquisitions through which foreign investors may acquire de facto control over domestic enterprises that raise "national security" concerns are subject to strict review by the Ministry of Commerce, and the rules prohibit any activities attempting to bypass a security review, including by structuring the transaction through a proxy or contractual control arrangement. In the future, we may grow our business by acquiring complementary businesses. Complying with the requirements of the above-mentioned regulations and other relevant rules to complete such transactions could be time consuming, and any required approval processes, including obtaining approval from the Ministry of Commerce or its local counterparts may delay or inhibit our ability to complete such transactions. It is unclear whether our business would be deemed to be in an industry that raises "national defense and security" or "national security" concerns. However, the Ministry of Commerce or other government agencies may publish explanations in the future determining that our business is in an industry subject to the security review, in which case our future acquisitions in the PRC, including those by way of entering into contractual control arrangements with target entities, may be closely scrutinized or prohibited. Our ability to expand our business or maintain or expand our market share through future acquisitions would as such be materially and adversely affected.

Risks Related to Our ADSs and This Offering

An active trading market for our ordinary shares or our ADSs may not develop and the trading price for our ADSs may fluctuate significantly.

        We have applied to list our ADSs on the [NYSE/NASDAQ Global Market]. Prior to the completion of this offering, there has been no public market for our ADSs or our ordinary shares underlying the ADSs, and we cannot assure you that a liquid public market for our ADSs will develop or be sustained after this offering. If an active public market for our ADSs does not develop following the completion of this offering, the market price and liquidity of our ADSs may be materially and adversely affected. The initial public offering price for our ADSs will be determined by negotiation between us and the underwriters based upon several factors, and we can provide no assurance that the trading price of our ADSs after this offering will not decline below the initial public offering price. As a result, investors in our securities may experience a significant decrease in the value of their ADSs.

The trading prices of our ADSs are likely to be volatile, which could result in substantial losses to investors.

        The trading prices of our ADSs are likely to be volatile and could fluctuate widely due to factors beyond our control. This may happen because of broad market and industry factors, like the performance and fluctuation of the market prices of other companies with business operations located mainly in China

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that have listed their securities in the United States. In recent months, the widespread negative publicity of alleged fraudulent accounting practices and poor corporate governance of certain U.S. public companies with operations in China were believed to have negatively affected investors' perception and sentiment towards companies with connection with China, which significantly and negatively affected the trading prices of some companies' securities listed in the U.S. Once we become a public company, any similar negative publicity or sentiment may affect the performances of our ADSs. A number of PRC companies have listed or are in the process of listing their securities on U.S. stock markets. The securities of some of these companies have experienced significant volatility, including price declines in connection with their initial public offerings. The trading performances of these PRC companies' securities after their offerings may affect the attitudes of investors toward PRC companies listed in the United States in general and consequently may impact the trading performance of our ADSs, regardless of our actual operating performance.

        In addition to market and industry factors, the price and trading volume for our ADSs may be highly volatile for factors specific to our own operations, including the following:

    the financial projections that we may choose to provide to the public, any changes in those projections or our failure for any reason to meet those projections;

    variations in our net revenues, net income and cash flow;

    changes in the economic performance or market valuation of other education companies;

    announcements of new investments, acquisitions by us or our competitors, strategic partnerships, joint ventures or capital commitments;

    announcements of new services and expansions by us or our competitors;

    detrimental negative publicity about us, our competitors or our industry;

    changes in financial estimates by securities analysts;

    additions or departures of key personnel;

    release of lock-up or other transfer restrictions on our outstanding equity securities or sales of additional equity securities;

    potential litigation or regulatory investigations;

    substantial sales or perception of sales of our ADSs in the public market;

    fluctuations in market prices for our products; and

    general economic, regulatory or political conditions in China and the U.S.

        Any of these factors may result in large and sudden changes in the volume and price at which our ADSs will trade. In addition, the stock market in general, and the market prices for companies with operations in China in particular, have experienced volatility that often has been unrelated to the operating performance of such companies. The securities of some PRC companies that have listed their securities in the United States have experienced significant volatility since their initial public offerings, including, in some cases, substantial price declines in the trading prices of their securities. The trading performances of these PRC companies' securities after their offerings may affect the attitudes of investors toward PRC companies listed in the United States, which consequently may impact the trading performance of our ADSs, regardless of our actual operating performance. In addition, any negative news or perceptions about inadequate corporate governance practices or fraudulent accounting, corporate structure or other matters of other PRC companies may also negatively affect the attitudes of investors towards PRC-based companies in general, including us, regardless of whether we have conducted any inappropriate activities. Further, the global financial crisis and the ensuing economic recessions in many

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countries have contributed and may continue to contribute to extreme volatility in the global stock markets. These broad market and industry fluctuations may adversely affect operating performance. Volatility or a lack of positive performance in our ADS price may also adversely affect our ability to retain key employees, some of whom have been granted restricted shares under our share incentive plan.

If securities or industry analysts do not publish research or reports about our business, or if they adversely change their recommendations regarding our ADSs, the market price for our ADSs and trading volume could decline.

        The trading market for our ADSs will be influenced by research reports and ratings that industry or securities analysts or ratings agencies publish about us, our business and the online education market in China in general. We do not have any control over these analysts or agencies. If one or more analysts or agencies who cover us downgrade our ADSs, or publish unfavorable research about us, the market price for our ADSs would likely decline. If one or more of these analysts cease to cover us or fail to regularly publish reports on us, we could lose visibility in the financial markets, which, in turn, could cause the market price or trading volume for our ADSs to decline.

The sale or availability for sale of substantial amounts of our ADSs could adversely affect their market price.

        Sales of substantial amounts of our ADSs in the public market after the completion of this offering, or the perception that these sales could occur, could adversely affect the market price of our ADSs and could materially impair our ability to raise capital through equity offerings in the future. The ADSs sold in this offering will be freely tradable without restriction or further registration under the Securities Act, and shares held by our existing shareholders may also be sold in the public market in the future subject to the restrictions in Rule 144 and Rule 701 under the Securities Act and the applicable lock-up agreements. There will be                ADSs (equivalent to ordinary shares) outstanding immediately after this offering, or                ADSs (equivalent to ordinary shares) if the underwriters exercise their option to purchase additional ADSs in full. In connection with this offering, we, our directors and executive officers, and our existing shareholders have agreed not to sell any ordinary shares or ADSs for 180 days after the date of this prospectus without the prior written consent of the underwriters. However, the underwriters may release these securities from these restrictions at any time, subject to applicable regulations of the Financial Industry Regulatory Authority, Inc. We cannot predict what effect, if any, market sales of securities held by our significant shareholders or any other shareholder or the availability of these securities for future sale will have on the market price of our ADSs. In addition, certain holders of our preferred shares prior to the completion of this offering are entitled to certain registration rights, including demand registration rights, piggyback registration rights, and Form F-3 or Form S-3 registration rights. Registration of these shares under the Securities Act would result in these shares becoming freely tradable without restriction under the Securities Act immediately upon the effectiveness of the registration. Sales of these registered shares in the public market, or the perception that such sales could occur, could cause the price of our ADSs to decline. See "Underwriting" and "Shares Eligible for Future Sale" for a more detailed description of the restrictions on selling our securities after this offering.

Because the initial public offering price is substantially higher than the pro forma net tangible book value per share, you will experience immediate and substantial dilution.

        If you purchase ADSs in this offering, you will pay more for each ADS than the corresponding amount paid by existing shareholders for their ordinary shares. As a result, you will experience immediate and substantial dilution of approximately US$            per ADS (assuming that no outstanding options to acquire ordinary shares are exercised). This number represents the difference between our pro forma net tangible book value per ADS of US$            as of March 31, 2016, after giving effect to this offering and the assumed initial public offering price of US$            per ADS, the midpoint of the estimated initial public offering price range set forth on the front cover of this prospectus. See "Dilution" for a more

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complete description of how the value of your investment in our ADSs will be diluted upon the completion of this offering.

There can be no assurance that we will not be a passive foreign investment company, or PFIC, for United States federal income tax purposes for any taxable year, which could subject United States investors in our ADSs or ordinary shares to significant adverse United States income tax consequences.

        A non-United States corporation, such as our company, will be classified as a PFIC, for U.S. federal income tax purposes for any taxable year, if either (i) 75% or more of its gross income for such year consists of certain types of "passive" income or (ii) 50% or more of the value of its assets (determined on the basis of a quarterly average) during such year is attributable to assets that produce or are held for the production of passive income (the "asset test"). Although the law in this regard is not clear, we treat our consolidated VIEs as being owned by us for U.S. federal income tax purposes because we exercise effective control over the consolidated VIEs and are entitled to substantially all of their economic benefits. As a result, we consolidate their results of operations in our consolidated U.S. GAAP financial statements. Assuming that we are the owner of our consolidated VIEs for U.S. federal income tax purposes, and based upon our current and expected income and assets (taking into account goodwill, other unbooked intangibles, and expected proceeds from this offering) and projections as to the value of our ADSs and ordinary shares immediately following the offering, we do not presently expect to be a PFIC for the current taxable year or the foreseeable future.

        While we do not expect to be or become a PFIC in the current or foreseeable taxable years, the determination of whether we will be or become a PFIC will depend, in part, upon the value of our goodwill and other unbooked intangibles (which will depend upon the market value of our ADSs from time to time, which may be volatile). Furthermore, the determination of whether we will be or become a PFIC will depend, in part, on the composition of our income and assets. Fluctuations in the market price of our ADSs or ordinary shares may cause us to become a PFIC for the current or subsequent taxable years. The composition of our income and assets may also be affected by how, and how quickly, we use our liquid assets and the cash raised in this offering. In addition, because there are uncertainties in the application of the relevant rules, it is possible that the Internal Revenue Service may challenge our classification of certain income and assets as non-passive or our valuation of our tangible and intangible assets.

        Because determination of PFIC status is a fact-intensive inquiry made on an annual basis that depends upon the composition of our assets and income, no assurance can be given that we are not or will not become classified as a PFIC. If we were to be or become classified as a PFIC in any taxable year, a U.S. Holder (as defined in "Taxation—United States Federal Income Taxation") may incur significantly increased U.S. federal income tax on gain recognized on the sale or other disposition of our ADSs or ordinary shares and on the receipt of distributions on the ADSs or ordinary shares to the extent such gain or distributions is treated as an "excess distribution" under the U.S. federal income tax rules. Further, if we are classified as a PFIC for any year during which a U.S. Holder holds our ADSs or ordinary shares, we generally will continue to be treated as a PFIC for all succeeding years during which such U.S. Holder holds our ADSs or ordinary shares. You are urged to consult your tax advisor concerning the United States federal income tax consequences of acquiring, holding, and disposing of ADSs if we are or become classified as a PFIC. For more information, see "Taxation—United States Federal Income Taxation."

You may face difficulties in protecting your interests, and your ability to protect your rights through U.S. courts may be limited, because we are incorporated under Cayman Islands law.

        We are an exempted company incorporated under the laws of the Cayman Islands. Our corporate affairs are governed by our memorandum and articles of association, the Companies Law of the Cayman Islands (2013 Revision) and the common law of the Cayman Islands. The rights of shareholders to take action against the directors, actions by minority shareholders and the fiduciary responsibilities of our directors to us under Cayman Islands law are to a large extent governed by the common law of the Cayman

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Islands. The common law of the Cayman Islands is derived in part from comparatively limited judicial precedent in the Cayman Islands as well as from the common law of England, the decisions of whose courts are of persuasive authority, but are not binding, on a court in the Cayman Islands. The rights of our shareholders and the fiduciary responsibilities of our directors under Cayman Islands law are not as clearly established as they would be under statutes or judicial precedent in some jurisdictions in the United States. In particular, the Cayman Islands has a less developed body of securities laws than the United States. Some U.S. states, such as Delaware, have more fully developed and judicially interpreted bodies of corporate law than the Cayman Islands. In addition, Cayman Islands companies may not have standing to initiate a shareholder derivative action in a federal court of the United States.

        The Cayman Islands courts are also unlikely:

    to recognize or enforce against us judgments of courts of the United States based on certain civil liability provisions of U.S. securities laws; and

    to impose liabilities against us, in original actions brought in the Cayman Islands, based on certain civil liability provisions of U.S. securities laws that are penal in nature.

        There is no statutory recognition in the Cayman Islands of judgments obtained in the United States, although the courts of the Cayman Islands will in certain circumstances recognize and enforce a non-penal judgment of a foreign court of competent jurisdiction without retrial on the merits.

        As a result of all of the above, public shareholders may have more difficulty in protecting their interests in the face of actions taken by management, members of the board of directors or controlling shareholders than they would as public shareholders of a company incorporated in the United States. For a discussion of significant differences between the provisions of the Companies Law of the Cayman Islands (2013 Revision) and the laws applicable to companies incorporated in the United States and their shareholders, see "Description of Share Capital—Differences in Corporate Law."

Judgments obtained against us by our shareholders may not be enforceable.

        We are a Cayman Islands company and all of our assets are located outside of the United States. The majority of our current operations are conducted in the China. In addition, a majority of our current directors and officers are nationals and residents of countries other than the United States. Substantially all of the assets of these persons are located outside the United States. As a result, it may be difficult or impossible for you to bring an action against us or against these individuals in the United States in the event that you believe that your rights have been infringed under the United States federal securities laws or otherwise. Even if you are successful in bringing an action of this kind, the laws of the Cayman Islands and of China may render you unable to enforce a judgment against our assets or the assets of our directors and officers. For more information regarding the relevant laws of the Cayman Islands and China, see "Enforceability of Civil Liabilities."

We have not determined a specific use for a portion of the net proceeds from this offering, and we may use these proceeds in ways with which you may not agree.

        We have not determined a specific use for a portion of the net proceeds of this offering, and our management will have considerable discretion in deciding how to apply these proceeds. For more information, see "Use of Proceeds." You will not have the opportunity to assess whether the proceeds are being used appropriately before you make your investment decision. You must rely on the judgment of our management regarding the application of the net proceeds of this offering. We cannot assure you that the net proceeds will be used in a manner that would improve our results of operations or increase our ADS price, nor that these net proceeds will be placed only in investments that generate income or appreciate in value.

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The voting rights of holders of ADSs are limited by the terms of the deposit agreement, and you may not be able to exercise your right to vote your ordinary shares.

        As a holder of our ADSs, you will only be able to exercise the voting rights with respect to the underlying ordinary shares in accordance with the provisions of the deposit agreement. Under the deposit agreement, you must vote by giving voting instructions to the depositary. Upon receipt of your voting instructions, the depositary will vote the underlying ordinary shares in accordance with these instructions. You will not be able to directly exercise your right to vote with respect to the underlying shares unless you withdraw the shares. Under our amended and restated memorandum and articles of association, the minimum notice period required for convening a general meeting is ten clear days. When a general meeting is convened, you may not receive sufficient advance notice to withdraw the shares underlying your ADSs to allow you to vote with respect to any specific matter. If we ask for your instructions, the depositary will notify you of the upcoming vote and will arrange to deliver our voting materials to you. We cannot assure you that you will receive the voting materials in time to ensure that you can instruct the depositary to vote your shares. In addition, the depositary and its agents are not responsible for failing to carry out voting instructions or for their manner of carrying out your voting instructions. This means that you may not be able to exercise your right to vote and you may have no legal remedy if the shares underlying your ADSs are not voted as you requested.

We are an emerging growth company within the meaning of the Securities Act and may take advantage of certain reduced reporting requirements.

        We are an "emerging growth company," as defined in the JOBS Act, and we may take advantage of certain exemptions from various requirements applicable to other public companies that are not emerging growth companies including, most significantly, not being required to comply with the auditor attestation requirements of Section 404 for so long as we are an emerging growth company. As a result, if we elect not to comply with such auditor attestation requirements, our investors may not have access to certain information they may deem important.

        The JOBS Act also provides that an emerging growth company does not need to comply with any new or revised financial accounting standards until such date that a private company is otherwise required to comply with such new or revised accounting standards. However, we have elected to "opt out" of this provision and, as a result, we will comply with new or revised accounting standards as required when they are adopted for public companies. This decision to opt out of the extended transition period under the JOBS Act is irrevocable.

We are a foreign private issuer within the meaning of the rules under the Exchange Act, and as such we are exempt from certain provisions applicable to United States domestic public companies.

        Because we qualify as a foreign private issuer under the Exchange Act, we are exempt from certain provisions of the securities rules and regulations in the United States that are applicable to U.S. domestic issuers, including:

    the rules under the Exchange Act requiring the filing with the U.S. Securities and Exchange Commission, or the SEC, of quarterly reports on Form 10-Q or current reports on Form 8-K;

    the sections of the Exchange Act regulating the solicitation of proxies, consents, or authorizations in respect of a security registered under the Exchange Act;

    the sections of the Exchange Act requiring insiders to file public reports of their share ownership and trading activities and liability for insiders who profit from trades made in a short period of time; and

    the selective disclosure rules by issuers of material nonpublic information under Regulation FD.

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        We will be required to file an annual report on Form 20-F within four months of the end of each fiscal year. In addition, we intend to publish our results on a quarterly basis as press releases, distributed pursuant to the rules and regulations of the [NYSE/NASDAQ Global Market]. Press releases relating to financial results and material events will also be furnished to the SEC on Form 6-K. However, the information we are required to file with or furnish to the SEC will be less extensive and less timely as compared to that required to be filed with the SEC by United States domestic issuers. As a Cayman Islands company listed on the [NYSE/NASDAQ Global Market], we are subject to the [NYSE/NASDAQ Global Market] corporate governance listing standards. However, [NYSE/NASDAQ Global Market] rules permit a foreign private issuer like us to follow the corporate governance practices of its home country. Certain corporate governance practices in the Cayman Islands, which is our home country, may differ significantly from the [NYSE/NASDAQ Global Market] corporate governance listing standards. Although we do not currently plan to utilize the home country exemption for corporate governance matters, to the extent that we choose to do so in the future, our shareholders may be afforded less protection than they otherwise would under the [NYSE/NASDAQ Global Market] corporate governance listing standards applicable to U.S. domestic issuers. As a result, you may not be afforded the same protections or information, which would be made available to you, were you investing in a United States domestic issuer.

You may not receive dividends or other distributions on our ordinary shares and you may not receive any value for them, if it is illegal or impractical to make them available to you.

        The depositary of our ADSs has agreed to pay to you the cash dividends or other distributions it or the custodian receives on ordinary shares or other deposited securities underlying our ADSs, after deducting its fees and expenses. You will receive these distributions in proportion to the number of ordinary shares your ADSs represent. However, the depositary is not responsible if it decides that it is unlawful or impractical to make a distribution available to any holders of ADSs. For example, it would be unlawful to make a distribution to a holder of ADSs if it consists of securities that require registration under the Securities Act but that are not properly registered or distributed under an applicable exemption from registration. The depositary may also determine that it is not feasible to distribute certain property through the mail. Additionally, the value of certain distributions may be less than the cost of mailing them. In these cases, the depositary may determine not to distribute such property. We have no obligation to register under U.S. securities laws any ADSs, ordinary shares, rights or other securities received through such distributions. We also have no obligation to take any other action to permit the distribution of ADSs, ordinary shares, rights or anything else to holders of ADSs. This means that you may not receive distributions we make on our ordinary shares or any value for them if it is illegal or impractical for us to make them available to you. These restrictions may cause a material decline in the value of our ADSs.

You may not be able to participate in rights offerings and may experience dilution of your holdings.

        We may, from time to time, distribute rights to our shareholders, including rights to acquire securities. [Under the deposit agreement, the depositary will not distribute rights to holders of ADSs unless the distribution and sale of rights and the securities to which these rights relate are either exempt from registration under the Securities Act with respect to all holders of ADSs, or are registered under the provisions of the Securities Act. The depositary may, but is not required to, attempt to sell these undistributed rights to third parties, and may allow the rights to lapse.] We may be unable to establish an exemption from registration under the Securities Act, and we are under no obligation to file a registration statement with respect to these rights or underlying securities or to endeavor to have a registration statement declared effective. Accordingly, holders of ADSs may be unable to participate in our rights offerings and may experience dilution of their holdings as a result.

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You may be subject to limitations on transfer of your ADSs.

        Your ADSs are transferable on the books of the depositary. However, the depositary may close its books at any time or from time to time when it deems expedient in connection with the performance of its duties. The depositary may close its books from time to time for a number of reasons, including in connection with corporate events such as a rights offering, during which time the depositary needs to maintain an exact number of ADS holders on its books for a specified period. The depositary may also close its books in emergencies, and on weekends and public holidays. The depositary may refuse to deliver, transfer or register transfers of our ADSs generally when our share register or the books of the depositary are closed, or at any time if we or the depositary thinks it is advisable to do so because of any requirement of law or of any government or governmental body, or under any provision of the deposit agreement, or for any other reason.

We will incur increased costs as a result of being a public company, particularly after we cease to qualify as an "emerging growth company."

        Upon completion of this offering, we will become a public company and expect to incur significant legal, accounting and other expenses that we did not incur as a private company. The Sarbanes-Oxley Act of 2002, as well as rules subsequently implemented by the SEC and the [NYSE/NASDAQ Global Market], impose various requirements on the corporate governance practices of public companies. As a company with less than US$1.0 billion in revenues for our last fiscal year, we qualify as an "emerging growth company" pursuant to the JOBS Act. An emerging growth company may take advantage of specified reduced reporting and other requirements that are otherwise applicable generally to public companies. These provisions include exemption from the auditor attestation requirement under Section 404 of the Sarbanes-Oxley Act of 2002 in the assessment of the emerging growth company's internal control over financial reporting and permission to delay adopting new or revised accounting standards until such time as those standards apply to private companies. However, we have elected to "opt out" of this provision and, as a result, we will comply with new or revised accounting standards as required when they are adopted for public companies. This decision to opt out of the extended transition period under the JOBS Act is irrevocable.

        We expect these rules and regulations to increase our legal and financial compliance costs and to make some corporate activities more time-consuming and costly. After we are no longer an "emerging growth company", we expect to incur significant expenses and devote substantial management effort toward ensuring compliance with the requirements of Section 404 of the Sarbanes-Oxley Act of 2002 and the other rules and regulations of the SEC. For example, as a result of becoming a public company, we will need to increase the number of independent directors and adopt policies regarding internal controls and disclosure controls and procedures. We also expect that operating as a public company will make it more difficult and more expensive for us to obtain director and officer liability insurance, and we may be required to accept reduced policy limits and coverage or incur substantially higher costs to obtain the same or similar coverage. In addition, we will incur additional costs associated with our public company reporting requirements. It may also be more difficult for us to find qualified persons to serve on our board of directors or as executive officers. We are currently evaluating and monitoring developments with respect to these rules and regulations, and we cannot predict or estimate with any degree of certainty the amount of additional costs we may incur or the timing of such costs.

        In the past, shareholders of a public company often brought securities class action suits against the company following periods of instability in the market price of that company's securities. If we were involved in a class action suit, it could divert a significant amount of our management's attention and other resources from our business and operations, which could harm our results of operations and require us to incur significant expenses to defend the suit. Any such class action suit, whether or not successful, could harm our reputation and restrict our ability to raise capital in the future. In addition, if a claim is successfully made against us, we may be required to pay significant damages, which could have a material adverse effect on our financial condition and results of operations.

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SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

        This prospectus contains forward-looking statements that involve risks and uncertainties. All statements other than statements of historical facts are forward-looking statements. These statements involve known and unknown risks, uncertainties and other factors that may cause our actual results, performance or achievements to be materially different from those expressed or implied by the forward-looking statements.

        You can identify these forward-looking statements by words or phrases such as "may," "will," "expect," "anticipate," "aim," "estimate," "intend," "plan," "believe," "likely to" or other similar expressions. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. These forward-looking statements include, but are not limited to, statements about:

    our goals and growth strategies;

    our expectations regarding demand for and market acceptance of our brand and platform;

    our ability to retain and increase our enrollment;

    our ability to offer new courses;

    our ability to engage, train and retain new teachers;

    our future business development, results of operations and financial condition;

    our ability to maintain and improve infrastructure necessary to operate our education platform;

    competition in our industry in China;

    the expected growth of, and trends in, the markets for our education programs in China;

    relevant government policies and regulations relating to our corporate structure, business and industry;

    our expectation regarding the use of proceeds from this offering;

    general economic and business condition in China, the Philippines and elsewhere; and

    assumptions underlying or related to any of the foregoing.

        You should read thoroughly this prospectus and the documents that we refer to in this prospectus with the understanding that our actual future results may be materially different from and worse than what we expect. Other sections of this prospectus include additional factors which could adversely impact our business and financial performance. Moreover, we operate in an evolving environment. New risk factors and uncertainties emerge from time to time and it is not possible for our management to predict all risk factors and uncertainties, nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in any forward-looking statements. We qualify all of our forward-looking statements by these cautionary statements.

        You should not rely upon forward-looking statements as predictions of future events. We undertake no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.

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USE OF PROCEEDS

        We estimate that we will receive net proceeds from this offering of approximately US$             million, or approximately US$             million if the underwriters exercise their option to purchase additional ADSs in full, after deducting underwriting discounts and commissions and the estimated offering expenses payable by us. These estimates are based upon an assumed initial offering price of US$            per ADS, the mid-point of the range shown on the front cover page of this prospectus. A US$1.00 change in the assumed initial public offering price of US$            per ADS would, in the case of an increase, increase and, in the case of a decrease, decrease the net proceeds of this offering by US$             million, or approximately US$             million if the underwriters exercise their option to purchase additional ADSs in full, assuming the sale of             ADSs at US$            per ADS, the mid-point of the range shown on the front cover page of this prospectus and after deducting underwriting discounts and commissions and the estimated offering expenses payable by us.

        The primary purposes of this offering are to create a public market for our shares for the benefit of all shareholders, retain talented employees by providing them with equity incentives and obtain additional capital. We plan to use the net proceeds of this offering primarily for general corporate purposes, which may include investing in sales and marketing activities, course development, technology infrastructure, capital expenditures and other general and administrative matters. We may also use a portion of the net proceeds for investing in, or acquiring, complementary businesses, although we have not identified any near-term investment or acquisition targets. The amounts and timing of any expenditures will vary depending on the amount of cash generated by our operations, and the rate of growth, if any, of our business. Accordingly, our management will have significant flexibility in applying the net proceeds of the offering. If an unforeseen event occurs or business conditions change, we may use the proceeds of this offering differently than as described in this prospectus.

        In utilizing the proceeds from this offering, we are permitted under PRC laws and regulations to provide funding to our PRC subsidiary only through loans or capital contributions, and to our PRC consolidated VIE only through loans, and only if we satisfy the applicable government registration and approval requirements. We cannot assure you that we will be able to meet these requirements on a timely basis, if at all. See "Risk Factors—Risks Related to Our Corporate Structure—PRC regulation on loans to, and direct investment in, PRC entities by offshore holding companies and governmental control in currency conversion may delay or prevent us from using the proceeds of this offering to make loans to our PRC subsidiary and PRC consolidated VIE or make additional capital contributions to our PRC subsidiary, which could materially and adversely affect our liquidity and our ability to fund and expand our business."

        Pending use of the net proceeds, we intend to hold our net proceeds in short-term, interest-bearing, financial instruments or demand deposits.

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DIVIDEND POLICY

        We have not previously declared or paid cash dividends and we have no plan to declare or pay any dividends in the near future on our shares or ADSs. We currently intend to retain most, if not all, of our available funds and any future earnings to operate and expand our business.

        We are a holding company incorporated in the Cayman Islands. We rely principally on dividends from our PRC subsidiary for our cash requirements, including any payment of dividends to our shareholders. PRC regulations may restrict the ability of our PRC subsidiary to pay dividends to us. See "PRC Regulation—Regulations on Foreign Exchange—Dividend Distribution."

        Our board of directors has discretion as to whether to distribute dividends, subject to the approval of our shareholders and applicable laws. Even if our board of directors decides to pay dividends, the form, frequency and amount will depend upon our future operations and earnings, capital requirements and surplus, general financial condition, contractual restrictions and other factors that the board of directors may deem relevant. If we pay any dividends, we will pay our ADS holders to the same extent as holders of our ordinary shares, subject to the terms of the deposit agreement, including the fees and expenses payable thereunder. See "Description of American Depositary Shares." Cash dividends on our ordinary shares, if any, will be paid in U.S. dollars.

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CAPITALIZATION

        The following table sets forth our capitalization as of March 31, 2016:

    on an actual basis;

    on a pro forma basis to reflect the automatic conversion of all of our outstanding preferred shares into ordinary shares immediately upon the completion of a qualified offering; and

    on a pro forma as adjusted basis to reflect (i) the automatic conversion of all of our outstanding preferred shares into ordinary shares immediately upon the completion of this offering and (ii) the sale of            ordinary shares in the form of ADSs by us in this offering at an assumed initial public offering price of US$            per ADS, the mid-point of the estimated range of the initial public offering price shown on the front cover of this prospectus, after deducting the underwriting discounts and commissions and estimated offering expenses payable by us.

        You should read this table together with our consolidated financial statements and the related notes included elsewhere in this prospectus and the information under "Management's Discussion and Analysis of Financial Condition and Results of Operations."

 
  As of March 31, 2016  
 
  Actual   Pro forma   Pro forma
as adjusted(1)
 
 
  RMB   US$   RMB   US$   RMB   US$  
 
  (in thousands)
 
 
   
   
  (Unaudited)
  (Unaudited)
 

Total mezzanine equity

    528,777     82,007                      

Shareholders' Deficit:

                                     

Ordinary shares (US$0.0001 par value; 500,000,000 shares authorized; 79,605,000, 72,267,532 and 72,267,532 shares issued and outstanding as of December 31, 2013, 2014 and 2015, respectively; 243,196,171 shares issued and outstanding on a pro forma basis as of March 31, 2016; and                         shares issued and outstanding on a pro forma as adjusted basis as of March 31, 2016 (unaudited))

    45     7     155     24              

Additional paid-in capital(2)

            528,667     81,990              

Accumulated other comprehensive gain

    5,219     809     5,219     809              

Accumulated deficit

    (718,647 )   (111,453 )   (718,647 )   (111,453 )            

Total shareholders' deficit(2)

    (713,383 )   (110,637 )   (184,606 )   (28,630 )            

Total liabilities, mezzanine equity and shareholders' deficit(2)

    278,897     43,253     278,897     43,253              

Notes:

(1)
The pro forma as adjusted information discussed above is illustrative only. Our additional paid-in capital, total shareholders' equity and total capitalization following the completion of this offering are subject to adjustment based on the actual initial public offering price and other terms of this offering determined at pricing.

(2)
Assuming the number of ADSs offered by us as set forth on the cover page of this prospectus remains the same, and after deduction of underwriting discounts and commissions and the estimated offering expenses payable by us, a US$1.00 change in the assumed initial public offering price of US$            per ADS would, in the case of an increase, increase and, in the case of a decrease, decrease each of additional paid-in capital, total shareholders' equity and total capitalization by US$             million.

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DILUTION

        If you invest in our ADSs, your interest will be diluted to the extent of the difference between the initial public offering price per ADS and our net tangible book value per ADS after this offering. Dilution results from the fact that the initial public offering price per ordinary share is substantially in excess of the book value per ordinary share attributable to the existing shareholders for our presently outstanding ordinary shares.

        Our net tangible book value as of December 31, 2015 was approximately US$            per ordinary share and US$            per ADS. Net tangible book value per ordinary share represents the amount of total tangible assets, minus the amount of total liabilities, divided by the total number of ordinary shares outstanding. Dilution is determined by subtracting net tangible book value per ordinary share from the assumed public offering price per ordinary share.

        Without taking into account any other changes in such net tangible book value after December 31, 2015, other than to give effect to (i) the conversion of all of our preferred shares into ordinary shares, which will occur automatically upon the completion of this offering, and (2) our issuance and sale of                ADSs in this offering, at an assumed initial public offering price of US$            per ADS, the mid-point of the estimated public offering price range, and after deduction of underwriting discounts and commissions and estimated offering expenses payable by us, our pro forma net tangible book value at March 31, 2016 would have been US$            per outstanding ordinary share, including ordinary shares underlying our outstanding ADSs, or US$            per ADS. This represents an immediate increase in net tangible book value of US$            per ordinary share, or US$            per ADS, to existing shareholders and an immediate dilution in net tangible book value of US$            per ordinary share, or US$            per ADS, to purchasers of ADSs in this offering.

        The following table illustrates the dilution on a per ordinary share basis assuming that the initial public offering price per ordinary share is US$            and all ADSs are exchanged for ordinary shares:

Assumed initial public offering price per ordinary share

  US$    

Net tangible book value per ordinary share

  US$    

Pro forma net tangible book value per ordinary share after giving effect to the automatic conversion of all of our outstanding preferred shares

  US$    

Pro forma net tangible book value per ordinary share as adjusted to give effect to the automatic conversion of all of our outstanding preferred shares and this offering as of March 31, 2016

  US$    

Amount of dilution in net tangible book value per ordinary share to new investors in the offering

  US$    

Amount of dilution in net tangible book value per ADS to new investors in the offering

  US$    

        A US$1.00 change in the assumed public offering price of US$            per ADS would, in the case of an increase, increase and, in the case of a decrease, decrease our pro forma net tangible book value after giving effect to the offering by US$             million, the pro forma net tangible book value per ordinary share and per ADS after giving effect to this offering by US$            per ordinary share and US$            per ADS and the dilution in pro forma net tangible book value per ordinary share and per ADS to new investors in this offering by US$            per ordinary share and US$            per ADS, assuming no change to the number of ADSs offered by us as set forth on the cover page of this prospectus, and after deducting underwriting discounts and commissions and estimated offering expenses. The pro forma information discussed above is illustrative only. Our net tangible book value following the completion of this offering is subject to adjustment based on the actual initial public offering price of our ADSs and other terms of this offering determined at pricing.

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        The following table summarizes, on a pro forma basis as of March 31, 2016, the differences between the shareholders as of March 31, 2016 and the new investors with respect to the number of ordinary shares purchased from us, the total consideration paid and the average price per ordinary share paid at an assumed initial public offering price of US$            per ADS before deducting estimated underwriting discounts and commissions and estimated offering expenses.

 
   
   
 
  
Total
Consideration
   
   
 
  Ordinary shares
Purchased
  Average Price
Per Ordinary
Share
  Average Price
Per ADS
 
  Amount
(US$)
   
 
  Number   Percent   Percent   US$   US$

Existing shareholders

                       

New investors

                       

Total

                       

        A US$1.00 change in the assumed public offering price of US$            per ADS would, in the case of an increase, increase and, in the case of a decrease, decrease total consideration paid by new investors, total consideration paid by all shareholders, average price per ordinary share and average price per ADS paid by all shareholders by US$            , US$            , US$            and US$            , respectively, assuming the sale of            ADSs at US$            , the mid-point of the range set forth on the cover page of this prospectus, and after deducting underwriting discounts and commissions and estimated offering expenses payable by us.

        The discussion and tables above also assume no exercise of any stock options outstanding as of March 31, 2016. As of March 31, 2016, there were 22,846,000 ordinary shares issuable upon exercise of outstanding stock options at a weighted average exercise price of US$0.0695 per ordinary share, and there were 13,383,922 ordinary shares available for future issuance upon the exercise of future grants under our 2013 Plan and 2014 Plan. To the extent that any of these options are exercised, there will be further dilution to new investors.

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EXCHANGE RATE INFORMATION

        Our reporting currency is the Renminbi because our business is mainly conducted in China and all of our revenues are denominated in Renminbi. This prospectus contains translations of Renminbi amounts into U.S. dollars at specific rates solely for the convenience of the reader. The conversion of Renminbi into U.S. dollars in this prospectus is based on the rate certified for customs purposes by the Federal Reserve Bank of New York. Unless otherwise noted, all translations from Renminbi to U.S. dollars and from U.S. dollars to Renminbi in this prospectus are made at the rate as of the end of the applicable period, that is, RMB6.4480 to US$1.00, the rate in effect as of March 31, 2016, RMB6.4778 to US$1.00, the rate in effect as of December 31, 2015, or RMB6.2046 to US$1.00, the rate in effect as of December 31, 2014, as applicable. We make no representation that any Renminbi or U.S. dollar amounts could have been, or could be, converted into U.S. dollars or Renminbi, as the case may be, at any particular rate, the rates stated below, or at all. The PRC government imposes control over its foreign currency reserves in part through direct regulation of the conversion of Renminbi into foreign exchange and through restrictions on foreign trade. On May 6, 2016, the rate was RMB6.4970 to U.S.$1.00.

        The following table sets forth information concerning exchange rates between the Renminbi and the U.S. dollar for the periods indicated. These rates are provided solely for your convenience and are not necessarily the exchange rates that we used in this prospectus or will use in the preparation of our periodic reports or any other information to be provided to you.

 
  Certified Exchange Rate  
Period
  Period End   Average(1)   Low   High  
 
  (RMB per US$1.00)
 

2010

    6.6000     6.7603     6.8102     6.6000  

2011

    6.2939     6.4475     6.6364     6.2939  

2012

    6.2301     6.2990     6.3879     6.2221  

2013

    6.0537     6.1478     6.2438     6.0537  

2014

    6.2046     6.1620     6.2591     6.0402  

2015

    6.4778     6.2827     6.4896     6.1870  

November

    6.3883     6.3640     6.3945     6.3180  

December

    6.4778     6.4491     6.4896     6.3883  

2016

                         

January

    6.5752     6.5726     6.5932     6.5219  

February

    6.5525     6.5501     6.5795     6.5154  

March

    6.4480     6.5027     6.5500     6.4480  

April

    6.4738     6.4754     6.5004     6.4571  

May (through May 6)

    6.4970     6.4917     6.5032     6.4738  

Source: Federal Reserve Statistical Release

Notes:

(1)
Annual averages were calculated by using the average of the exchange rates on the last day of each month during the relevant year. Monthly averages are calculated by using the average of the daily rates during the relevant month.

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ENFORCEABILITY OF CIVIL LIABILITIES

        We were incorporated in the Cayman Islands in order to enjoy the following benefits:

    political and economic stability;

    an effective judicial system;

    a favorable tax system;

    the absence of exchange control or currency restrictions; and

    the availability of professional and support services.

        However, certain disadvantages accompany incorporation in the Cayman Islands. These disadvantages include, but are not limited to, the following:

    the Cayman Islands has a less developed body of securities laws as compared to the United States and these securities laws provide significantly less protection to investors; and

    Cayman Islands companies may not have standing to sue before the federal courts of the United States.

        Our constitutional documents do not contain provisions requiring that disputes, including those arising under the securities laws of the United States, between us, our officers, directors and shareholders, be arbitrated.

        All of our operations are conducted outside the United States, and all of our assets are located outside the United States. A majority of our directors and officers are nationals or residents of jurisdictions other than the United States and a substantial portion of their assets are located outside the United States. As a result, it may be difficult for a shareholder to effect service of process within the United States upon these persons, or to enforce against us or them judgments obtained in United States courts, including judgments predicated upon the civil liability provisions of the securities laws of the United States or any state in the United States.

        We have appointed Law Debenture Corporate Services Inc. as our agent upon whom process may be served in any action brought against us under the securities laws of the United States.

        Travers Thorp Alberga, our counsel as to Cayman Islands law, and Han Kun Law Offices, our counsel as to PRC law, have advised us, respectively, that there is uncertainty as to whether the courts of the Cayman Islands and China, respectively, would:

    recognize or enforce judgments of United States courts obtained against us or our directors or officers predicated upon the civil liability provisions of the securities laws of the United States or any state in the United States; or

    entertain original actions brought in each respective jurisdiction against us or our directors or officers predicated upon the securities laws of the United States or any state in the United States.

        Travers Thorp Alberga has informed us that it is uncertain whether the courts of the Cayman Islands will allow shareholders of our company to originate actions in the Cayman Islands based upon securities laws of the United States. In addition, there is uncertainty with regard to Cayman Islands law related to whether a judgment obtained from the U.S. courts under civil liability provisions of U.S. securities laws will be determined by the courts of the Cayman Islands as penal or punitive in nature. If such a determination is made, the courts of the Cayman Islands will not recognize or enforce the judgment against a Cayman Islands company, such as our company. As the courts of the Cayman Islands have yet to rule on making such a determination in relation to judgments obtained from U.S. courts under civil liability provisions of U.S. securities laws, it is uncertain whether such judgments would be enforceable in the Cayman Islands. Travers Thorp Alberga has further advised us that the courts of the Cayman Islands would recognize as a

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valid judgment a final and conclusive judgment in personam obtained in the federal or state courts in the United States under which a sum of money is payable (other than a sum of money payable in respect of multiple damages, taxes or other charges of a like nature or in respect of a fine or other penalty) or, in certain circumstances, an in personam judgment for non-monetary relief, and would give a judgment based thereon provided that: (i) such courts had proper jurisdiction over the parties subject to such judgment; (ii) such courts did not contravene the rules of natural justice of the Cayman Islands; (iii) such judgment was not obtained by fraud; (iv) the enforcement of the judgment would not be contrary to the public policy of the Cayman Islands; (v) no new admissible evidence relevant to the action is submitted prior to the rendering of the judgment by the courts of the Cayman Islands; and (vi) there is due compliance with the correct procedures under the laws of the Cayman Islands.

        We have been advised by Han Kun Law Offices, our PRC counsel, that there is uncertainty as to whether the courts of the PRC would enforce judgments of United States courts or Cayman courts obtained against us or these persons predicated upon the civil liability provisions of the United States federal and state securities laws. Han Kun Law Offices has further advised us that the recognition and enforcement of foreign judgments are provided for under PRC Civil Procedures Law. PRC courts may recognize and enforce foreign judgments in accordance with the requirements of PRC Civil Procedures Law based either on treaties between China and the country where the judgment is made or on reciprocity between jurisdictions. China does not have any treaties or other form of reciprocity with the United States or the Cayman Islands that provide for the reciprocal recognition and enforcement of foreign judgments. In addition, according to the PRC Civil Procedures Law, courts in the PRC will not enforce a foreign judgment against us or our directors and officers if they decide that the judgment violates the basic principles of PRC law or national sovereignty, security or public interest. As a result, it is uncertain whether and on what basis a PRC court would enforce a judgment rendered by a court in the United States or in the Cayman Islands.

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CORPORATE HISTORY AND STRUCTURE

        We began our operations in July 2011 through Beijing Dasheng Zhixing Technology Co., Ltd., or Dasheng Zhixing, a PRC domestic company. 51Talk English Philippines Corporation, or Philippines Co I, was incorporated in August 2012 to conduct our business operations in the Philippines, including teacher sourcing, teacher engagement, teacher training, teacher quality control, course content development and free trial lessons.

        In order to facilitate international capital raising of our company, we incorporated China Online Education Group, or COE, to become our offshore holding company under the laws of the Cayman Islands in November 2012. In January 2013, China Online Education (HK) Limited, or COE HK Co I, was incorporated in Hong Kong as a wholly owned subsidiary of COE. Beijing Dasheng Online Technology Co., Ltd., or Dasheng Online, was set up in June 2013 as a wholly owned subsidiary of COE HK Co I in the PRC.

        Due to PRC legal restrictions on foreign ownership and investment in the value-added telecommunications market, we operate our online platform through Dasheng Zhixing, our PRC consolidated VIE. Dasheng Zhixing holds our ICP license necessary to operate our online platform in China, our domain names, including 51talk.com, our registered trademarks in China and three of our registered software copyrights that are essential to the Company's online operation in PRC. Dasheng Zhixing had 1,489 staff, including 278 employees and 1,211 Outsourced Personnel, and leased seven office facilities as of March 31, 2016. We rely on a series of contractual arrangements among Dasheng Online, Dasheng Zhixing and its shareholders to operate our online and mobile platforms in China. These contractual arrangements enable us to:

    exercise effective control over Dasheng Zhixing;

    receive substantially all of the economic benefits of Dasheng Zhixing in consideration for the services provided by us; and

    have an exclusive option to purchase all of the equity interests in Dasheng Zhixing when and to the extent permitted under PRC law.

        We do not have equity interests in Dasheng Zhixing. However, as a result of these contractual arrangements, we are the primary beneficiary of Dasheng Zhixing and treat it as our consolidated VIE under U.S. GAAP.

        In October 2014, we undertook an internal reorganization, pursuant to which we established two new subsidiaries, namely 51Talk English International Limited, or COE HK Co II, in Hong Kong and China Online Innovations Inc., or Philippines Co II, in the Philippines. Since the reorganization, foreign teachers delivering paid lessons on our platform no longer entered into service agreements with Philippines Co I, but rather entered into service agreements with COE HK Co II. Furthermore, we transferred the bulk of our Philippine business operations from Philippines Co I to Philippines Co II, and we began to enter into employment agreements with new full-time employees in the Philippines using Philippines Co II. In January 2016, we established a new subsidiary in the Philippines, namely On Demand English Innovations Inc., or Philippines Co III. In April 2016, we transferred all business operations and most of the assets of Philippines Co I to Philippines Co III. After these internal reorganizations, Philippines Co III conducts our business operations relating to the free trial lessons delivered by our free trial teachers based in Baguio City, Philippines and Philippines Co II conducts the remainder of our business operations in the Philippines, including teacher sourcing, teacher engagement, teacher training, teacher quality control, course content development and free trial lessons offered by our free trial teachers based in Manila, Philippines.

        Philippines Co I currently does not have any material business operation, and we intend to gradually liquidate Philippines Co I.

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        Under the Philippine Corporation Code, the business, assets and affairs of a corporation is handled and managed by a board of directors, which is composed of the number of individuals mandated under the corporation's articles of incorporation. Philippine law further requires that each director own at least one share of stock in his or her name in the books of the corporation. In order to comply with the foregoing, there are seven individual shareholders of Philippines Co II and five individual shareholders of Philippines Co III, holding an aggregate of 0.00014% and 0.004% of the equity interest of Philippines Co II and Philippines Co III, respectively. COE entered into contractual arrangements with each of (i) Philippines Co II and its seven individual shareholders and (ii) Philippines Co III and its five individual shareholders. These contractual arrangements provide us with an exclusive option to purchase all of the equity interests in Philippines Co II and Philippines Co III held by individual shareholders and the power to exercise their respective shareholder rights.

        In January 2015, we acquired and consolidated the business operations and assets of 91Waijiao, a provider of English education programs in China that focused on offering live lessons by foreign teachers online. The following operating metrics of our company exclude the corresponding data of 91Waijiao for all periods presented in this prospectus, all of which have been immaterial to our overall business operation since our acquisition of the business operations and assets of 91Waijiao: (i) the number of paid lessons booked, (ii) the number of active students, (iii) the number of paying students and (iv) the number of teachers available.

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        The following diagram illustrates our current corporate structure:

GRAPHIC


Notes:

(1)
Each of Ting Shu, Christine Ang, Huiru Yuan, Jennifer Que, Samuel Celestino, Xing Liu and Wei Li holds 0.00002% of the equity interest in Philippines Co II. Each of Ting Shu, Christine Ang, Huiru Yuan, Jennifer Que and Samuel Celestino is a director of Philippines Co II. We entered into contractual arrangements with these individual shareholders which provide us an exclusive option to purchase all of the individual shareholders' equity interests in Philippines Co II and the power to exercise their shareholder rights.

(2)
Each of Jimmy Lai, Frank Lin, Nelson Tan, Luzviminda Santos Castro and Alfonso Ang Po holds 0.0008% of the equity interest in Philippines Co III. Each of these individuals is a director of Philippines Co III. We entered into contractual arrangements with these individual shareholders which provide us with an exclusive option to purchase all of the individual shareholders' equity interests in Philippines Co III and the power to exercise their respective shareholder rights.

(3)
Jack Jiajia Huang holds 99.90% of the equity interest in Philippines Co I; Kei Hattori holds 0.02% of the equity interest in Philippines Co I; Nelson Tan holds 0.06% of the equity interest in Philippines Co I; and Frank Lin holds 0.02% of the equity interest in Philippines Co I. Each of Mr. Hattori, Mr. Tan and Mr. Lin is a director of Philippines Co I.

(4)
Jack Jiajia Huang, our founder, chairman and chief executive officer, holds 61.25% of the equity interest in Dasheng Zhixing; Ting Shu, our co-founder, director and senior vice president, holds 26.25% of the equity interest in Dasheng Zhixing; Ling Chen, an affiliate of an angel investor of our company, holds 12.50% of the equity interest in Dasheng Zhixing.

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    Contractual Arrangements with Dasheng Zhixing, Philippines Co I, Philippines Co II and Philippines Co III

        The following is a summary of (i) the contracts by and among our subsidiary Dasheng Online, our PRC consolidated VIE Dasheng Zhixing, and the shareholders of Dasheng Zhixing; (ii) the contracts by and among our subsidiary COE HK Co I, our consolidated VIE Philippines Co I, and the shareholders of Philippines Co I; (iii) the contracts by and among COE, Philippines Co II, and the shareholders of Philippines Co II; and (iv) contracts by and among COE, Philippines Co III and the shareholders of Philippines Co III, each of which is currently in full force and effect.

        Amended and Restated Exclusive Business Cooperation Agreement.    Under the amended and restated exclusive business cooperation agreement between Dasheng Online and Dasheng Zhixing, Dasheng Online has the exclusive right to provide or to designate any third party to provide, among other things, technical support, consulting services and other services to Dasheng Zhixing, and Dasheng Zhixing agrees to accept all the consultation and services provided by Dasheng Online or any third party service provider designated by Dasheng Online. Without Dasheng Online's prior written consent, Dasheng Zhixing is prohibited from directly or indirectly engaging any third party to provide same or any similar services under this agreement or establishing similar corporation relationship with any third party regarding the matters contemplated by this agreement. In addition, Dasheng Online or the third party service providers designated by Dasheng Online, as the case may be, have exclusive and proprietary ownership, rights and interests in any and all intellectual properties arising out of or created during the performance of this agreement. Dasheng Zhixing agrees to pay a monthly service fee to Dasheng Online at an amount determined at the sole discretion of Dasheng Online after taking into account factors including the complexity and difficulty of the services provided, the title of and time consumed by employees of Dasheng Online or third party service providers designated by Dasheng Online providing the services, the content and value of services provided and the market price of the same type of services. The original exclusive business cooperation agreement was entered into and made effective on June 18, 2013, which was subsequently amended and restated in its entirety on December 14, 2015. This agreement will remain effective unless terminated in accordance with its provisions or terminated in writing by Dasheng Online. Unless otherwise required by applicable laws, Dasheng Zhixing does not have any right to terminate this agreement in any event. Dasheng Online has the right to terminate this agreement and/or require Dasheng Zhixing to indemnify all damages in the event of any material breach of any term of this agreement by Dasheng Zhixing. Dasheng Zhixing agrees to indemnify and hold harmless Dasheng Online from any losses, injuries, obligations or expenses caused by any lawsuits, claims or other demands against Dasheng Online arising from or caused by the services provided by Dasheng Online to Dasheng Zhixing pursuant to this agreement, except where such losses, injuries, obligations or expenses arise from the gross negligence or willful misconduct of Dasheng Online.

        COE HK Co I and Philippines Co I also entered into an exclusive business cooperation agreement on July 21, 2014, whereby COE HK Co I has the exclusive right to provide, among other things, technical support, consulting services and other services to Philippines Co I and Philippines Co I agrees to accept all the consultation and services provided by COE HK Co I. Without COE HK Co I's prior written consent, Philippines Co I is prohibited from directly or indirectly engaging any third party to provide same or any similar services under this agreement or establishing similar corporation relationship with any third party regarding the matters contemplated by this agreement. Philippines Co I agrees to pay a monthly service fee to COE HK Co I at an amount determined by COE HK Co I and Philippines Co I through negotiation after taking into account factors including the complexity and difficulty of the services provided, the title of and time consumed by employees of COE HK Co I providing the services, the content and value of services provided, the market price of the same type of services. The agreement shall remain effective unless terminated in accordance with the provisions of this agreement or terminated in writing by COE HK Co I. Unless otherwise required by applicable laws, Philippines Co I does not have any right to terminate this agreement in any event.

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        Powers of Attorney.    Pursuant to the powers of attorney executed by the shareholders of Dasheng Zhixing on June 18, 2013, the shareholders of Dasheng Zhixing each irrevocably authorized Dasheng Online to act on their respective behalf as exclusive agent and attorney with respect to all matters concerning all equity interests held by each of them now and in the future in Dasheng Zhixing, including but not limited to attend shareholders' meetings, exercise all the shareholder's rights and shareholder's voting rights that each of them is entitled to under the relevant PRC laws and Dasheng Zhixing Articles of Association (including but not limited to the sale, transfer, pledge, or disposition of all equity interests held in part or in whole), and designate and appoint on their respective behalf the legal representative, directors, supervisors, chief executive officer and other senior management members of Dasheng Zhixing. Dasheng Online is entitled to re-authorize or assign its rights under this appointment to any other person or entity at its sole discretion and without giving prior notice to the shareholders of Dasheng Zhixing or obtaining their consent. Each power of attorney will remain in force until the shareholder ceases to hold any equity interest in Dasheng Zhixing. During the term of the powers of attorney, the shareholders waive all the rights associated with the equity interests held by them, which have been authorized to Dasheng Online through this power of attorney, and would not exercise such rights by themselves. The power of attorney was each executed on June 18, 2013, and shall remain effective until the shareholder ceases to hold any equity interest in Dasheng Zhixing.

        On July 21, 2014, August 31, 2015 and February 1, 2016, the individual shareholders of each of Philippines Co I, Philippines Co II and Philippines Co III, respectively, have also each executed an irrevocable power of attorney appointing COE HK Co I and COE, respectively, as their attorney-in-fact to vote on their behalf on all matters requiring shareholder approval, with terms substantially similar to the powers of attorney executed by the shareholders of Dasheng Zhixing described above.

        Equity Interest Pledge Agreements.    Under the equity interest pledge agreements between Dasheng Online, the shareholders of Dasheng Zhixing and Dasheng Zhixing, the shareholders pledged all of their equity interests in Dasheng Zhixing to Dasheng Online as security for performance of the obligations of Dasheng Zhixing and its shareholders under the amended and restated exclusive business cooperation agreement, exclusive option agreements, the powers of attorney and the equity interest pledge agreements. Dasheng Online is entitled to receive dividends distributed by the pledged equity interests during the term of the pledge. Dasheng Zhixing may receive dividends distributed only with prior written consent of Dasheng Online. If any event of default as provided in the contractual arrangements occurs, Dasheng Online may exercise the right to enforce the pledge after issuing a notice of default to Dasheng Zhixing in accordance with the equity interest pledge agreements. Dasheng Online may exercise any remedy measure under applicable PRC laws, the amended and restated exclusive business cooperation agreement, the exclusive option agreements, the powers of attorney and the equity interest pledge agreements, including but not limited to being paid in priority with the equity interest based on monetary valuation that such equity interest is converted into or from the proceeds from auction or sale of the equity interest. The shareholders of Dasheng Zhixing and Dasheng Zhixing do not have the right to assign or delegate their rights and obligations under the amended and restated exclusive business cooperation agreement, the exclusive option agreements, the powers of attorney and the equity interest pledge agreements without Dasheng Online's prior written consent. Dasheng Online may assign any and all of its rights and obligations under the agreements to its designee(s) at any time. The agreements are binding on the shareholders of Dasheng Zhixing and their successors and permitted assignees and shall be valid with respect to Dasheng Online and each of its successors and assignees. The pledges were entered into and became effective on June 18, 2013 and will remain binding until the fulfillment of all obligations and the full payment under the equity interest pledge agreements.

        Exclusive Option Agreements.    Under the exclusive option agreements between Dasheng Online, each of the shareholders of Dasheng Zhixing and Dasheng Zhixing, in consideration of the payment of RMB10 by Dasheng Online, each of the shareholders irrevocably granted Dasheng Online a binding and exclusive right to purchase or designate one or more persons to purchase, equity interests in Dasheng Zhixing then held by each shareholder at once or at multiple times at any time in part or in whole at Dasheng Online's

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sole and absolute discretion to the extent permitted by PRC law and at the price of RMB10 (or such minimum price decided by PRC law higher than RMB10). Without Dasheng Online's prior written consent, Dasheng Zhixing's shareholders shall not sell, transfer, mortgage, or otherwise dispose in any manner any material assets of Dasheng Zhixing or legal or beneficial interest in the material business or revenues of Dasheng Zhixing in an amount exceeding RMB500,000, or allow the encumbrance thereon of any security interests; or cause Dasheng Zhixing to execute any contract with a price exceeding RMB500,000, except the contracts in the ordinary course of business. Unless otherwise required by PRC law, Dasheng Zhixing shall not be dissolved or liquidated without prior written consent by Dasheng Online. The shareholders of Dasheng Zhixing waive their rights of first refusal in regard to the transfer of equity interest by any other shareholder of Dasheng Zhixing to Dasheng Online (if any), give consents to the execution by each other shareholder of Dasheng Zhixing with Dasheng Online and Dasheng Zhixing the exclusive option agreements, the equity interest pledge agreements and the powers of attorney, and accept not to take any actions in conflict with such documents executed by other shareholders. The shareholders of Dasheng Zhixing agree to promptly donate any profits, interests, dividends, or proceeds of liquidation to Dasheng Online or any other person designated by Dasheng Online to the extent permitted under the applicable PRC laws. These agreements were entered into and became effective on June 18, 2013 and shall remain in effect until all equity interests in Dasheng Zhixing held by the shareholders have been transferred or assigned to Dasheng Online and/or any other person designed by Dasheng Online in accordance with this agreement. The shareholders of Dasheng Zhixing and Dasheng Zhixing do not have any right to terminate the exclusive option agreements in any event unless otherwise required by the applicable laws.

        COE HK Co I, Philippines Co I and the individual shareholders of Philippines Co I entered into exclusive option agreements on July 21, 2014 and August 31, 2015. COE, Philippines Co II and the individual shareholders of Philippines Co II entered into exclusive option agreements on August 31, 2015. COE, Philippines Co III and the individual shareholders of Philippines Co III entered into exclusive option agreements on February 1, 2016. Such exclusive option agreements contain terms substantially similar to the exclusive option agreements described above.

        Spousal Consent Letters.    Pursuant to the spousal consent letters executed by the spouses of the shareholders of Dasheng Zhixing, the spouse of each shareholder of Dasheng Zhixing, respectively, agreed to the execution of the equity interest pledge agreement, the exclusive option agreement and the powers of attorney by the respective shareholder. The spouse of each shareholder of Dasheng Zhixing further undertakes not to make any assertions in connection with the equity interests of Dasheng Zhixing held by the respective shareholder, and further confirms in the spousal consent letters that the respective shareholder can perform the relevant transaction documents described above and further amend or terminate such transaction documents without the authorization or consent from him/her. The spouse of each shareholder agrees and undertakes that if he/she obtain any equity interests of Dasheng Zhixing held by the respective shareholder for any reasons, he/she would be bound by the transaction documents described above and the amended and restated exclusive business cooperation agreement between Dasheng Online and Dasheng Zhixing, and would comply with the obligations thereunder as a shareholder of Dasheng Zhixing. Xiaoping Xu, spouse of Ling Chen, has executed the spousal consent letter on June 18, 2013, and each of Jack Jiajia Huang and Ting Shu has executed and delivered the spousal consent letter on December 14, 2015.

        In the opinion of our PRC counsel, Han Kun Law Offices, the contractual arrangements among Dasheng Online, Dasheng Zhixing and its shareholders are valid, binding and enforceable under current PRC law. However, these contractual arrangements may not be as effective in providing control as direct ownership. There are substantial uncertainties regarding the interpretation and application of current or future PRC laws and regulations. For a description of the risks related to our corporate structure, please see "Risk Factors—Risks Related to Our Corporate Structure."

        In the opinion of our Philippines counsel, Romulo Mabanta Buenaventura Sayoc & de los Angeles, the contractual arrangements in respect of Philippines Co I, Philippines Co II and Philippines Co III are valid, binding and enforceable under current laws of the Philippines.

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SELECTED CONSOLIDATED FINANCIAL DATA

        The following selected consolidated comprehensive loss data for the years ended December 31, 2013, 2014 and 2015, summary consolidated balance sheet data as of December 31, 2013, 2014 and 2015 and selected consolidated cash flow data for the years ended December 31, 2013, 2014 and 2015 and have been derived from our audited consolidated financial statements included elsewhere in this prospectus. Our consolidated financial statements are prepared and presented in accordance with U.S. GAAP. The following summary consolidated statements of comprehensive loss for the three months ended March 31, 2015 and 2016, summary consolidated balance sheet data as of March 31, 2016 and summary consolidated cash flow data for the three months ended March 31, 2015 and 2016 have been derived from our unaudited interim condensed consolidated financial statements included elsewhere in this prospectus and have been prepared on the same basis as our audited consolidated financial statements and include all adjustments, consisting only of normal and recurring adjustments, that we consider necessary for a fair presentation of our financial position and operating results for the periods presented. Our historical results are not necessarily indicative of results expected for future periods. You should read this Selected Consolidated Financial Data section together with our consolidated financial statements and the related notes and "Management's Discussion and Analysis of Financial Condition and Results of Operations" included elsewhere in this prospectus.

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  For the Year Ended December 31,   For the Three Months Ended
March 31,
 
 
  2013   2014   2015   2015   2016  
 
  RMB   RMB   RMB   US$   RMB   RMB   US$  
 
  (in thousands, except for share, per share and per ADS data)
 

Selected Consolidated Statements of Comprehensive Loss:

                                           

Net revenues

    21,665     52,210     154,675     23,878     24,374     72,191     11,196  

Cost of revenues

    (9,302 )   (22,214 )   (59,668 )   (9,211 )   (9,816 )   (26,308 )   (4,080 )

Gross profit

    12,363     29,996     95,007     14,667     14,558     45,883     7,116  

Operating expenses:

                                           

Sales and marketing

    (17,124 )   (81,269 )   (297,337 )   (45,901 )   (49,050 )   (94,245 )   (14,616 )

Product development

    (3,018 )   (10,781 )   (54,597 )   (8,428 )   (7,153 )   (26,542 )   (4,116 )

General and administrative

    (8,597 )   (31,553 )   (64,903 )   (10,019 )   (9,337 )   (25,658 )   (3,979 )

Total operating expenses

    (28,739 )   (123,603 )   (416,837 )   (64,348 )   (65,540 )   (146,445 )   (22,711 )

Loss from operations

    (16,376 )   (93,607 )   (321,830 )   (49,681 )   (50,982 )   (100,562 )   (15,595 )

Interest and other (expense)/income, net

    (710 )   (1,213 )   (353 )   (54 )   (322 )   1,666     258  

Loss before income tax expenses

    (17,086 )   (94,820 )   (322,183 )   (49,735 )   (51,304 )   (98,896 )   (15,337 )

Income tax expenses

    (710 )   (6,882 )   (4,903 )   (757 )   (2,399 )   (362 )   (56 )

Net loss

    (17,796 )   (101,702 )   (327,086 )   (50,492 )   (53,703 )   (99,258 )   (15,393 )

Accretions to preferred shares redemption value

    (322 )   (23,020 )   (75,665 )   (11,681 )   (11,368 )   (49,815 )   (7,726 )

Deemed dividends at re-designation of ordinary shares to preferred shares

    (2,309 )   (5,665 )                    

Net loss attributable to ordinary shareholders

    (20,427 )   (130,387 )   (402,751 )   (62,173 )   (65,071 )   (149,073 )   (23,119 )

Net loss

    (17,796 )   (101,702 )   (327,086 )   (50,492 )   (53,703 )   (99,258 )   (15,393 )

Other comprehensive (loss)/income:

                                           

Foreign currency translation adjustments

    (571 )   2,308     3,014     465     (94 )   581     90  

Total comprehensive loss

    (18,367 )   (99,394 )   (324,072 )   (50,027 )   (53,797 )   (98,677 )   (15,303 )

Weighted average number of ordinary shares used in computing basic and diluted loss per share

    84,660,041     76,308,165     72,267,532     72,267,532     72,267,532     72,267,532     72,267,532  

Net loss per share attributable to ordinary shareholders

    (0.24 )   (1.71 )   (5.57 )   (0.86 )   (0.90 )   (2.06 )   (0.32 )

Loss per ADS(1)

                                           

Basic

                                           

Diluted

                                           

Non-GAAP Financial Measure(2)

   
 
   
 
   
 
   
 
   
 
   
 
   
 
 

Gross billings

    36,097     116,921     353,277     54,537     53,302     154,770     24,003  

Notes:

(1)
Each ADS represents          ordinary shares.

(2)
For discussions of gross billings and reconciliation of gross billings to net revenues, see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measure."

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        The following table presents our selected consolidated balance sheet data as of December 31, 2013, 2014 and 2015 and March 31, 2016.

 
  As of December 31,   As of March 31, 2016  
 
  2013   2014   2015    
   
   
   
 
 
   
   
  RMB
Pro forma(1)
  US$
Pro forma(1)
 
 
  RMB   RMB   RMB   US$   RMB   US$  
 
  (in thousands)
 

Selected Consolidated Balance Sheet Data:

                                                 

Cash and cash equivalents

    61,502     209,774     46,873     7,236     76,873     11,922     76,873     11,922  

Total assets

    63,496     227,067     291,550     45,008     278,897     43,253     278,897     43,253  

Deferred revenues

    16,479     78,416     272,176     42,017     348,136     53,991     348,136     53,991  

Accrued expenses and other current liabilities

    5,861     25,155     84,323     13,017     92,120     14,287     92,120     14,287  

Total liabilities

    24,162     115,813     377,867     58,333     463,503     71,883     463,503     71,883  

Total mezzanine equity

    65,531     277,723     478,962     73,939     528,777     82,007          

Total shareholders' deficit

    (26,197 )   (166,469 )   (565,279 )   (87,264 )   (713,383 )   (110,637 )   (184,606 )   (28,630 )

Notes:

(1)
All of the preferred shares will automatically convert into ordinary shares at the applicable conversion price upon closing of a qualified initial public offering. The unaudited pro forma balance sheet information as of March 31, 2016 assumes the automatic conversion of all of the outstanding preferred shares into ordinary shares on a one-to-one basis, as if conversion had occurred as of March 31, 2016.

        The following table presents our selected consolidated cash flow data for the years ended December 31, 2013, 2014 and 2015, as well as the three months ended March 31, 2015 and 2016.

 
  For the Year Ended December 31,   For the Three Months
Ended March 31,
 
 
  2013   2014   2015   2015   2016  
 
  RMB   RMB   RMB   US$   RMB   RMB   US$  
 
  (in thousands)
 

Selected Consolidated Cash Flow Data:

                                           

Net cash provided by/(used in) operating activities

    1,956     (15,461 )   (104,020 )   (16,058 )   (13,351 )   (3,719 )   (577 )

Net cash (used in)/provided by investing activities

    (386 )   (7,814 )   (192,884 )   (29,776 )   (6,520 )   34,585     5,364  

Net cash provided by financing activities

    59,273     169,724     125,574     19,385              

Effect of exchange rate changes on cash and cash equivalents

    (565 )   1,823     8,429     1,301     82     (866 )   (134 )

Net increase/(decrease) in cash and cash equivalents

    60,278     148,272     (162,901 )   (25,148 )   (19,789 )   30,000     4,653  

Cash and cash equivalents at beginning of the period

    1,224     61,502     209,774     32,384     209,774     46,873     7,269  

Cash and cash equivalents at end of the period

    61,502     209,774     46,873     7,236     189,985     76,873     11,922  

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MANAGEMENT'S DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS

        You should read the following discussion and analysis of our financial condition and results of operations in conjunction with the section entitled "Selected Consolidated Financial Data and Operating Data" and our consolidated financial statements and the related notes included elsewhere in this prospectus. This discussion contains forward-looking statements that involve risks and uncertainties. Our actual results and the timing of events could differ materially from those anticipated in these forward-looking statements as a result of various factors, including those set forth under "Risk Factors" and elsewhere in this prospectus.

Overview

        We are a leading online education platform in China, with core expertise in English education. According to the Frost & Sullivan Report, we are one of the top online education platforms as measured by gross billings in 2015, and the largest online English education platform in China, as measured by gross billings in 2015 and the number of available foreign teachers as of December 31, 2015.

        Our proprietary online and mobile education platforms enable students across China to take one-on-one live interactive English lessons with overseas foreign teachers, on demand. Our teacher training, curriculum design and sales and marketing efforts are all driven by student and teacher feedback and data analytics.

        Our business model is highly scalable, characterized by the sharing economy approach to assembling teachers, cost advantages of teachers in the Philippines, and online and mobile platforms. We are able to build a large team of teachers because they can deliver lessons based on their scheduling availability, at appropriate locations of their choice, and get paid based on the number of lessons taught. We have developed significant operational expertise in areas such as teacher engagement and training, course content development, sales and marketing, as well as student services.

        We have experienced significant growth in recent years. Our gross billings increased from RMB36.1 million in 2013 to RMB116.9 million in 2014, and further to RMB353.3 million (US$54.5 million) in 2015, and increased from RMB53.3 million in the three months ended March 31, 2015 to RMB154.8 million (US$24.0 million) in the three months ended March 31, 2016. We define gross billings for a specific period as the total amount of cash received for the purchase of course packages in such period, net of the total amount of refunds in such period. For discussions of gross billings and reconciliation of gross billings to net revenues, see "Management's Discussion and Analysis of Financial Condition and Results of Operations—Non-GAAP Financial Measure." Our net revenues increased from RMB21.7 million in 2013 to RMB52.2 million in 2014, and further to RMB154.7 million (US$23.9 million) in 2015, and increased from RMB24.4 million in the three months ended March 31, 2015 to RMB72.2 million (US$11.2 million) in the three months ended March 31, 2016. We had a net loss of RMB17.8 million, RMB101.7 million and RMB327.1 million (US$50.5 million) in 2013, 2014 and 2015, respectively. In the three months ended March 31, 2016, we had a net loss of RMB99.3 million (US$15.4 million), compared to a net loss of RMB53.7 million in the three months ended March 31, 2015.

Major Factors Affecting Our Results of Operations

        Our results of operations and financial condition are affected by the general factors driving China's private education industry. We have benefited from the rapid economic growth, significant urbanization, and higher per capita disposable income of urban households in China, which has allowed many in China to spend more disposable income on education. We have also benefited from the increasing internet penetration in China. We anticipate that the demand for online education generally, and online English education specifically, will continue to grow. According to the Frost & Sullivan Report, China's online English education market in terms of gross billings increased from RMB3.4 billion (US$0.5 billion) in 2010

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to RMB18.3 billion (US$2.8 billion) in 2015, representing a CAGR of 40.0%, and is expected to further increase to RMB160.9 billion (US$24.8 billion) in 2020, representing a CAGR of 54.5% from 2015.

        However, any adverse changes in the economic conditions in China that adversely affect the online English education and the broader online education markets in China may harm our business and results of operations. See "Risk Factors—Risks Related to Doing Business in China—Changes in China's economic, political or social conditions or government policies could have a material adverse effect on our business and operations" and "Risk Factors—Risks Related to Doing Business in China—A severe or prolonged downturn in the global or PRC economy could materially and adversely affect our business and our financial condition."

        While our business is influenced by factors affecting the private education industry in China generally, we believe that our results of operations are more directly affected by company-specific factors, including the following factors:

    our ability to increase gross billings and net revenues;

    our ability to control teacher costs; and

    our ability to effectively and efficiently sell and market our course packages.

    Our ability to increase gross billings and net revenues

        We consider gross billings, a non-GAAP financial measure, to be an important indicator of our business as it measures fees received from our students upfront. Our gross billings for a specific period refers to the total amount of cash received for the purchase of course packages in such period, net of the total amount of refunds in such period. As a result, gross billings offers management the ability to better evaluate our scale of business operations, our liquidity and the visibility of future revenues. The growth of our gross billings is driven by the increase in the number of paying students and the average spending per paying student. Our gross billings increased from RMB36.1 million in 2013 to RMB116.9 million in 2014, and further to RMB353.3 million (US$54.5 million) in 2015, and increased from RMB53.3 million in the three months ended March 31, 2015 to RMB154.8 million (US$24.0 million) in the three months ended March 31, 2016. Our paying students increased from 13.9 thousand in 2013 to 28.8 thousand in 2014, and further to 68.5 thousand in 2015, and increased from 13.2 thousand in the three months ended March 31, 2015 to 26.4 thousand in the three months ended March 31, 2016. Our gross billings are not equivalent to net revenues or any other metric presented in our consolidated financial statements. See "—Non-GAAP Financial Measures."

        Due to our increasing brand awareness, and word-of-mouth referrals, our students have increasingly purchased larger initial packages that can be used over a longer period of time and have a higher price, which in turn increases our gross billings. The average spending per paying student increased from RMB2.6 thousand in 2013 to RMB4.1 thousand in 2014 and further reached RMB5.2 thousand (US$0.8 thousand) in 2015, and increased from RMB4.0 thousand in the three months ended March 31, 2015 to RMB5.9 thousand (US$0.9 thousand) in the three months ended March 31, 2016. In particular, the average course package size initially purchased by our students experienced more significant growth, increasing from RMB1.9 thousand in 2013 to RMB3.4 thousand in 2014 and further reaching RMB4.7 thousand (US$0.7 thousand) in 2015, and increased from RMB4.0 thousand in the three months ended March 31, 2015 to RMB5.8 thousand (US$0.9 thousand) in the three months ended March 31, 2016. This trend has been particularly evident among our K-12 students. The average initial package size purchased by our K-12 students increased from RMB4.2 thousand in the three months ended March 31, 2015 to RMB5.3 thousand in the three months ended December 31, 2015 and RMB6.2 thousand in the three months ended March 31, 2016.

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        The following table sets forth our gross billings, paying students and average spending per paying student for the periods indicated:

 
  For the Year Ended
December 31,
  For the Three
Months Ended
March 31,
 
 
  2013   2014   2015   2015   2016  

Active students (in thousands)

    15.2     35.0     86.5     32.4     71.9  

Paying students (in thousands)

    13.9     28.8     68.5     13.2     26.4  

Average spending per paying student (in RMB thousands)

    2.6     4.1     5.2     4.0     5.9  

        Our revenue growth is driven by increases in the number of active students and the increase in average revenue per active student. These factors are directly affected by the increasing number of paying students, effectiveness of our curriculum and students' experience on our platform. The number of active students increased from 15.2 thousand in 2013 to 35.0 thousand in 2014, and further reached 86.5 thousand in 2015, and increased from 32.4 thousand in the three months ended March 31, 2015 to 71.9 thousand in the three months ended March 31, 2016. The number of active students reached 101.2 thousand in the 12 months ended March 31, 2016. An "active student" for a specified period refers to a student who booked at least one paid lesson. A lesson is considered "booked" when it is taken or when the student to such lesson is confirmed absent. A "paying student" for a specified period refers to a student that purchased either a prepaid credit or prepaid membership course package during the period, and the total number of "paying students" for a specified period refers to the total number of paying students for such period minus the total number of students that obtained refunds during such period.

    Our ability to control teacher costs

        Our profitability depends on our ability to control our costs as we expand. Our cost of revenues primarily consists of service fees to our teachers who delivered paid lessons. Teachers who deliver our lessons are generally independent contractors and are paid according to the number of lessons they teach. Substantially all of our teachers are based in the Philippines and we have benefited from lower labor costs in the Philippines. Whether we can continue to control our teacher cost in the future depends on, to a significant extent, the general labor market in the Philippines. As the Philippines is subject to a relatively high degree of political and social instability, any material disruptions resulting from this instability could increase our teacher costs.

        The average spending per paying student has increased historically, and our students have increasingly purchased larger initial packages that can be used over a longer period of time and have a higher price. We have observed a recent increase in the forfeiture rate of our prepaid credit packages. On the one hand, in terms of direct and immediate impact on our financial results, an increase in forfeiture rates increases our gross margin, because we were able to recognize fees for un-booked lesson credits as revenues without having to incur the cost of paying the teachers for providing the lessons. On the other hand, a continued increase in forfeiture rate might negatively impact the perceived effectiveness of our curriculum and the level of student engagement on our platform, which may discourage prospective and existing students from purchasing course packages from us or referring other students to us.

    Our ability to effectively and efficiently sell and market our education program

        To maintain and improve our operating margins, we depend on our ability to effectively and efficiently sell and market our course packages and to benefit from economies of scale as we expand our business. Sales and marketing expenses historically represent a significant majority of our total operating expenses. Sales expenses are primarily composed of telemarketing sales and free trial lesson-related expenses. Marketing expenses are primarily composed of online and mobile marketing, and branding expenses. Our ability to lower our sales and marketing expenses as a percentage of net revenues depends on our ability to

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improve sales and marketing efficiency and leverage our existing brand value and word-of-mouth referrals in our marketing efforts.

        Going forward, we expect our operating expenses to increase due to the expansion of our business and the additional costs and expenses associated with becoming a public company. However, if our branding and marketing activities are not well received by students or fail to generate the increases in sales that we anticipate, we may need to allocate additional resources to these activities and our results of operations will be negatively impacted. See "Risk Factors—Risks Related to Our Business and Industry—If we are unable to conduct our sales and marketing activities cost-effectively, our results of operations and financial condition may be materially and adversely affected."

Selected Income Statement Items

    Net Revenues

        We derive all of our net revenues from fees that we charge our students. In 2013, 2014 and 2015, we generated net revenues of RMB21.7 million, RMB52.2 million and RMB154.7 million (US$23.9 million), respectively. In the three months ended March 31, 2015 and 2016, we generated net revenues of RMB24.4 million and RMB72.2 million (US$11.2 million), respectively. We generally collect fees in advance, which we initially record as deferred revenues. We offer two types of course packages for our students to purchase, including prepaid credit packages and prepaid membership packages. We recognize fees as revenues as the lesson credits are consumed, in the case of prepaid credit packages, and proportionally throughout the membership period, in the case of prepaid membership packages. For prepaid credit packages, fees for lessons that have expired are automatically recognized as revenues. We had deferred revenues of RMB16.5 million, RMB78.4 million, RMB272.2 million (US$42.0 million) and RMB348.1 million (US$54.0 million) as of December 31, 2013, 2014 and 2015 and March 31, 2016, respectively. Our net revenues are presented net of value-added tax and surcharges.

    Cost of Revenues

        Our cost of revenues primarily consists of service fees to our teachers who delivered paid lessons and, to a lesser extent, payment processing fees charged by third party payment channels. We recorded cost of revenues of RMB9.3 million, RMB22.2 million and RMB59.7 million (US$9.2 million) in 2013, 2014 and 2015. In the three months ended March 31, 2015 and 2016, we recorded cost of revenues of RMB9.8 million and RMB26.3 million (US$4.1 million).

    Operating Expenses

        Our operating expenses consist of sales and marketing expenses and general and administrative expenses, and to a lesser extent, product development expenses. The following table sets forth, for the periods indicated, our operating expenses, in absolute amounts and as percentages of total net revenues:

 
  For the Year Ended December 31,   For the Three Months Ended March 31,  
 
  2013   2014   2015   2015   2016  
 
  RMB   %   RMB   %   RMB   US$   %   RMB   %   RMB   US$   %  
 
  (in thousands, except for percentages)
 

Operating expenses:

                                                                         

Sales and marketing

    17,124     79.0 %   81,269     155.7 %   297,337     45,901     192.2 %   49,050     201.2 %   94,245     14,616     130.5 %

General and administrative

    8,597     39.7     31,553     60.4     64,903     10,019     42.0     9,337     38.3     25,658     3,979     35.5  

Product development

    3,018     13.9     10,781     20.6     54,597     8,428     35.3     7,153     29.3     26,542     4,116     36.8  

Total operating expenses

    28,739     132.6 %   123,603     236.7 %   416,837     64,348     269.5 %   65,540     268.8 %   146,445     22,711     202.8 %