Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Depreciation is recognized over the following useful lives in straight-line method, taking into consideration the assets’ estimated salvage value:

Building		30 years
Computer equipment		3 to 5 years
Furniture, fixtures and office equipment		5 years
Software		3 to 5 years
Motor vehicles		5 years
Leasehold improvements		The shorter of lease terms and estimated useful lives

Employee Benefit Plans

Employee benefit expenses recognized under these plans for nine months ended December 31, 2017, the years ended December 31, 2018 and 2019 are allocated to the following expense items:

	Nine months ended December 31		Twelve months ended December 31		Twelve months ended December 31
	2017		2018		2019
	RMB		RMB		RMB
Cost of revenues		78,381		79,280	2,363,553
Research and development		2,296,392		3,232,457	2,468,898
Sales and marketing		334,628		771,479	2,077,128
General and administrative		810,713		1,530,096	3,301,256
Total expense due to employee benefit plans		3,520,114		5,613,312	10,210,835