Intangible assets, net (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Group's intangible assets

	December 31,
	2016		2017
	RMB		RMB
Gross carrying amount
Operating rights		98,929		47,020
Software		30,632		34,413
Domain names		27,311		25,774
Technology		18,282		17,676
Brand names		59,034		-
Others		18,300		-
Total of gross carrying amount		252,488		124,883
Less: accumulated amortization
Operating rights		(77,659)		(40,320)
Software		(13,110)		(19,448)
Domain names		(8,449)		(9,687)
Technology		(9,457)		(10,695)
Brand names		(21,810)		-
Others		(3,592)		-
Total accumulated amortization		(134,077)		(80,150)
Less: accumulated impairment		(59,485)		(7,252)
Intangible assets, net		58,926		37,481

Schedule of weighted average amortization periods of intangible assets

	December 31,
	2016	2017
Domain names	15 years	15 years
Technology	5 years	5 years
Software	5 years	4 years
Operating rights	1 years	1 year
Brand names	Not applicable	Not applicable

Other Intangible Assets [Member]

Schedule of estimated amortization expenses

	Amortization expense of intangible assets
2018		13,050
2019		8,639
2020		4,666
2021		1,838
2022		1,798