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FINANCE COSTS (Details) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
FINANCE COSTS      
Interest on lease liability ¥ 2,166 ¥ 2,746 ¥ 315
Other   ¥ 2