Revenues and Deferred Revenue (Tables)

12 Months Ended

Dec. 31, 2021

Disaggregation Of Revenue [Abstract]

Schedule of Disaggregation of Revenue

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

Schedule of Movements of the Deferred Revenue

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).