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LOSS PER SHARE (Details) - CNY (¥)
¥ / shares in Units, ¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
LOSS PER SHARE      
Loss attributable to holders of ordinary shares ¥ (88,752) ¥ (193,095) ¥ (9,501)
Weighted average number of ordinary shares outstanding used in computing basic and diluted (loss)/earnings per share 5,147,737 2,940,265 2,025,222
Weighted average number of ordinary shares outstanding used in computing basic and diluted earnings per share 5,147,737 2,940,265 2,025,222
Loss per share - basic (RMB) ¥ (17.24) ¥ (65.67) ¥ (4.68)
Loss per share - diluted (RMB) ¥ (17.24) ¥ (65.67) ¥ (4.68)