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LOSS PER SHARE (Details) - ¥ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
LOSS PER SHARE      
Loss attributable to holders of ordinary shares (9,501,000) (418,674,000) (88,026,000)
Weighted average number of ordinary shares outstanding used in computing basic and diluted (loss)/earnings per share 6,075,667 4,493,036 3,339,487
Loss per share - basic (RMB) ¥ (1.56) ¥ (93.18) ¥ (26.36)
Loss per share - diluted (RMB) ¥ (1.56) ¥ (93.18) ¥ (26.36)