Certain risks and concentration (Tables)

12 Months Ended

Dec. 31, 2017

Certain risks and concentration [Abstract]

Schedule of consolidated financial information of the Group's VIEs and VIE's subsidiaries excluding the inter company items with the Group's subsidiaries included in the accompanying consolidated financial statements

	December 31,
	2016		2017
	RMB		RMB
Assets
Current assets
Cash and cash equivalents		1,397,738		1,343,731
Short-term deposits		1,235,000		3,400,000
Restricted short-term deposits		-		1,000,000
Short-term investments		-		124,550
Accounts receivable, net		165,971		149,958
Inventory		2,266		315
Amounts due from related parties		135,245		9,309
Prepayments and other current assets		207,245		190,456
Total current assets		3,143,465		6,218,319

Non-current assets
Deferred tax assets		93,744		113,017
Investments		496,870		582,775
Property and equipment, net		261,915		359,912
Intangible assets, net		27,241		15,504
Land use right, net		1,872,394		1,832,739
Goodwill		2,527		-
Amounts due from related parties		-		20,000
Other non-current assets		85,583		133,812
Total non-current assets		2,840,274		3,057,759

Total assets		5,983,739		9,276,078

Liabilities
Current liabilities
Accounts payable		117,917		67,817
Deferred revenue		429,883		757,244
Advances from customers		56,108		80,406
Income taxes payable		112,779		142,204
Accrued liabilities and other current liabilities		988,911		1,404,877
Amounts due to related parties		91,245		30,502
Total current liabilities		1,796,843		2,483,050

Non-current liabilities
Deferred revenue		19,125		52,185
Deferred tax liabilities		4,777		8,404
Total non-current liabilities		23,902		60,589

Total liabilities		1,820,745		2,543,639

	For the year ended December 31,
	2015		2016		2017
	RMB		RMB		RMB

Net revenues		5,821,305		8,164,100		11,577,104
Net income		1,267,111		1,874,435		2,766,279

	For the year ended December 31,
	2015		2016		2017
	RMB		RMB		RMB

Net cash provided by operating activities		2,164,953		2,538,836		3,974,085
Net cash used in investing activities		(2,251,207)		(1,313,002)		(3,571,668)
Net cash provided by financing activities		704,298		8,508		66,875
		618,044		1,234,342		469,292

Summary of the percentage of accounts receivable from collection agencies, sub-licensed platforms and advertising customers with over 10% of total accounts receivable

	December 31,
	2016			2017

Payment platforms
B1		19	%		26	%
B2		17	%		18	%
B3		*			19	%

Less than 10%

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

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