Fixed Assets. Net (Tables)

12 Months Ended

Dec. 31, 2018

Property Plant And Equipment [Abstract]

Components of Fixed Assets

Fixed assets consist of the following:

	As of December 31,
	2017			2018			2018
	RMB			RMB			US$
Computer equipment		1,519,261			2,057,218			299,210
Office building		589,543			588,685			85,621
Leasehold improvements		79,036			97,938			14,244
Office furniture and equipment		40,634			57,999			8,436
Others		9,729			12,957			1,884
		2,238,203			2,814,797			409,395
Less: Accumulated depreciation		(996,656	)		(1,263,673	)		(183,793	)
Construction in progress		7,421			67,023			9,748
		1,248,968			1,618,147			235,350