Property and equipment, net (Tables)

12 Months Ended

Dec. 31, 2017

Property and equipment, net [Abstract]

Schedule of property and equipment

	December 31,
	2016		2017
	RMB		RMB
Gross carrying amount
Buildings		482,333		731,640
Servers, computers and equipment		565,786		588,589
Leasehold improvements		80,812		18,651
Decoration of buildings		68,981		100,711
Motor vehicles		24,016		27,330
Furniture, fixture and office equipment		23,259		24,102
Construction in progress		5,586		44,103
Total		1,250,773		1,535,126
Less: accumulated depreciation		(412,023)		(518,128)
Property and equipment, net		838,750		1,016,998