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CASH AND BANK BALANCES - Cash and bank balances are denominated in currencies (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure Of CASH AND BANK BALANCES [Line Items]        
Cash and cash equivalents ¥ 8,212 ¥ 9,016 ¥ 2,328 ¥ 110
Renminbi        
Disclosure Of CASH AND BANK BALANCES [Line Items]        
Cash and cash equivalents 784 203    
Hong Kong dollars        
Disclosure Of CASH AND BANK BALANCES [Line Items]        
Cash and cash equivalents 6 6    
US dollars        
Disclosure Of CASH AND BANK BALANCES [Line Items]        
Cash and cash equivalents ¥ 7,422 ¥ 8,807