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Intangible assets, net (Narrative) (Details)
¥ in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Oct. 02, 2015
CNY (¥)
Jun. 30, 2015
CNY (¥)
Dec. 31, 2015
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2014
CNY (¥)
Dec. 31, 2013
CNY (¥)
Intangible assets, net [Abstract]            
Impairment of intangible assets ¥ 8,385 ¥ 48,814 $ 8,830 ¥ 57,199 ¥ 5,697
Amortization of acquired intangible assets     $ 9,911 ¥ 64,201 ¥ 12,598 ¥ 4,707