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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (BASIS OF PREPARATION) (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2019
USD ($)
Dec. 31, 2019
CNY (¥)
Dec. 31, 2018
CNY (¥)
Dec. 31, 2017
CNY (¥)
Dec. 31, 2016
CNY (¥)
Statement Line Items [Line Items]          
Net current liabilities | ¥   ¥ 28,380 ¥ 22,070    
Deficiency in assets | ¥   ¥ (27,554) ¥ (21,798) ¥ (15,505) ¥ 13,195
USD [Member]          
Statement Line Items [Line Items]          
Net current liabilities | $ $ 4,080        
Deficiency in assets | $ $ (3,957)