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Principal accounting policies (Tables)

12 Months Ended

Dec. 31, 2015

Principal accounting policies [Abstract]

Schedule of property and equipment estimated useful lives and residual rate

		Estimated useful lives			Residual rate

Buildings		40 years			0%
Decoration of buildings		10 years			0 %
Servers, computers and equipment		3 years			0%-5%
Furniture, fixture and office equipment		5 years			0%-5%
Motor vehicles		4 years			5%
Leasehold improvements		Shorter of lease term or 5 years			-

Schedule of amortization of finite-lived intangible assets is computed using the straight-line method over the following estimated useful lives

		Estimated useful lives

Brand names		1-15 years
Operating rights for licensed games		Shorter of the economic life or license period of relevant online game
Software		3 -5 years
Operating rights for game broadcasting		Over the contract terms
Domain names		15 years
Technology		5 years
Others		3-5 years