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INTEREST-BEARING LOANS AND BORROWINGS (Tables)
12 Months Ended
Dec. 31, 2023
Interest-bearing Loans And Borrowings  
Schedule of interest-bearing loans and borrowings
                     
           December 31, 
           2022   2023   2023 
           CNY   CNY   US$ 
   Interest rate   Maturity             
                     
Non-current interest-bearing loans                         
Bank loan-secured and guaranteed   5.05%   2023 to 2038    71,000         
                          
Current interest-bearing loans                         
Bank loan-secured and guaranteed   5.05%   2022 to 2023    3,000         
                          
Total             74,000