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INTEREST-BEARING LOANS AND BORROWINGS (Tables)
 12 Months Ended
Dec. 31, 2022
Interest-bearing Loans And Borrowings  
Schedule of Interest-bearing Loans and Borrowings
                     
           December 31, 
           2021   2022   2022 
           CNY   CNY   US$ 
   Interest rate   Maturity             
                     
Non-current interest-bearing loans                         
Bank loan-secured and guaranteed   5.05%   

2023 to 2038

    74,000    71,000    10,293 
                          
Current interest-bearing loans                         
Bank loan-secured and guaranteed   5.05%   

2022 to 2023

    3,000    3,000    435 
                          
Total             77,000    74,000    10,728