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Accounts Receivable, Net (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2016
CNY (¥)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
CNY (¥)
Dec. 31, 2013
CNY (¥)
Accounts Receivable, Net [Abstract]            
Accounts receivable, gross ¥ 496,381 $ 71,494 ¥ 565,197      
Allowance for doubtful accounts (91,348) (13,157) (58,846) $ (8,476) ¥ (23,767) ¥ (20,584)
Accounts receivable, net ¥ 405,033 $ 58,337 ¥ 506,351