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DISCONTINUED OPERATIONS (Schedule of net cash flows Double Grow) (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 29, 2017
Statement Line Items [Line Items]        
Operating activities ¥ (3,333) ¥ (7,527) ¥ (14,746)  
Investing activities (5) 9,372 2,868  
Financing activities (24) (13,813) 12,630  
Net cash outflows ¥ (3,362) ¥ (11,968) ¥ 752  
Discontinued operation of Double Grow [Member]        
Statement Line Items [Line Items]        
Operating activities       ¥ (5,796)
Investing activities       (5,823)
Financing activities       10,173
Net foreign exchange difference       (100)
Net cash outflows       ¥ (1,546)