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INVENTORIES (Details) - CNY (¥)
¥ in Thousands
Dec. 31, 2020
Dec. 31, 2019
INVENTORIES    
Raw materials ¥ 6,281 ¥ 14,776
Work in progress 1,040 1,103
Finished goods 44,880 149,417
Current inventories ¥ 52,201 ¥ 165,296