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RIGHT-OF-USE ASSETS AND LEASES LIABILITIES (Details) - CNY (¥)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jan. 01, 2021
Jan. 01, 2020
Jan. 01, 2019
Right of Use [Line Items]            
Carrying amounts of right-of-use assets           ¥ 17,266,000
Amortization charge of right-of-use assets ¥ 14,067,000 ¥ 13,082,000 ¥ 12,187,000      
Interest expense on lease liability 2,166,000 2,746,000 315,000      
Total cash outflow in financing activities for leases 15,447,000 14,841,000 ¥ 13,902,000      
Right-of-use assets [member]            
Right of Use [Line Items]            
Carrying amounts of right-of-use assets 44,288,000 58,458,000   ¥ 58,458,000 ¥ 5,078,000  
Amortization charge of right-of-use assets 14,067,000 13,082,000        
Interest expense on lease liability ¥ 2,166,000 ¥ 2,746,000