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TRADE RECEIVABLES (Details 1) - CNY (¥)
¥ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Disclosure Of TRADE RECEIVABLES [Line Items]    
Current trade receivables ¥ 224,114 ¥ 532,361
Within 90 days    
Disclosure Of TRADE RECEIVABLES [Line Items]    
Current trade receivables 57,785 246,441
Between 3 and 6 months    
Disclosure Of TRADE RECEIVABLES [Line Items]    
Current trade receivables 69,037 275,329
More than 6 months    
Disclosure Of TRADE RECEIVABLES [Line Items]    
Current trade receivables ¥ 97,292 ¥ 10,591