Revenues and Deferred Revenue

12 Months Ended

Dec. 31, 2021

Disaggregation Of Revenue [Abstract]

Revenues and Deferred Revenue

12. REVENUES AND DEFERRED REVENUE

For the years ended December 31, 2019, 2020 and 2021, all of the Group’s revenues were generated in the PRC, and the disaggregated revenues by types were as follows:

	Years ended December 31,
	2019			2020			2021
	RMB			RMB			RMB
Disaggregation of revenues
Revenue by types:
Gross revenues:
Degree- or diploma-oriented post-secondary courses		2,021,990			1,904,957			1,636,256
Professional certification preparation and    professional skills courses		155,370			268,118			794,700
Subtotal Online educational courses		2,177,360			2,173,075			2,430,956
Commissions		15,381			19,985			50,465
Others		8,100			11,286			28,979
Total revenues		2,200,841			2,204,346			2,510,400
Less: sales tax and surcharges		(6,939	)		(555	)		(2,583	)
Total net revenues		2,193,902			2,203,791			2,507,817

The movements of the deferred revenue for the years ended December 31, 2020 and 2021 were as follows ⁽¹⁾:

	As of December 31,
	2020			2021
	RMB			RMB
Beginning balance (current and noncurrent)		3,228,770			3,024,443
Additions		2,246,023			1,930,075
Deductions		(2,450,350	)		(2,606,339	)
Ending balance (current and noncurrent)		3,024,443			2,348,179
Deferred revenue, current		1,463,165			1,266,948
Deferred revenue, non-current		1,561,278			1,081,231

(1) Amounts presented are inclusive of VAT (see VAT in Note 2).

Deferred revenue primarily consists of educational service fees received from customers for which the Group’s revenue recognition criteria have not been met. Deferred revenue balance will be recognized as revenue once the criteria for revenue recognition are met. The current portion of deferred revenue as of January 1, 2020 and January 1, 2021 were substantially all recognized as revenue during the years ended December 31, 2020 and 2021, respectively.

The Group’s remaining performance obligations, representing the amount of the transaction price for which service has not been provided, is substantially included in the deferred revenue account on the consolidated financial statements and the related disclosures. As of December 31, 2021, the deferred revenue balance was RMB2,348,179, of which RMB1,266,948 and RMB411,786 will be recognized as revenue over the next 12 and 24 months, respectively, with the remainder of RMB669,445 recognized thereafter.