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INCOME TAX EXPENSE/(CREDIT) (Details 3) - CNY (¥)
¥ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure Of INCOME TAX EXPENSE CREDIT [Abstract]        
Deferred tax assets ¥ 0 ¥ (209)    
Deferred tax liabilities 0 0    
Deferred tax liability (asset) ¥ 0 ¥ (209) ¥ (4,765) ¥ (8,180)