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EMPLOYEE DEFINED CONTRIBUTION PLAN (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2016
CNY (¥)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
CNY (¥)
Dec. 31, 2014
CNY (¥)
China [Member]        
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]        
Contributions to defined contribution plans ¥ 13,078 $ 1,884 ¥ 12,677 ¥ 12,789
SINGAPORE        
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items]        
Contributions to defined contribution plans ¥ 265 $ 38 ¥ 181 ¥ 0