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EMPLOYEE BENEFITS OBLIGATIONS (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
EMPLOYEE BENEFITS OBLIGATIONS [abstract]      
Employee benefits obligations ¥ 28,389 ¥ 30,745 ¥ 34,043
Less: current portion included in accruals and other payables (28,389) (30,745)  
Noncurrent provisions for employee benefits ¥ 0 ¥ 0