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LOSS BEFORE TAXATION - Additional Information - (Details) - CNY (¥)
¥ in Millions
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
LOSS BEFORE TAXATION    
Inventory impairment provision ¥ 1.6 ¥ 2.4
Depreciation and amortisation expense ¥ 6.4 ¥ 6.4