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EMPLOYEE BENEFITS (Tables)
 12 Months Ended
Dec. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of employee benefits
                 
   Year Ended December 31, 
   2022   2023   2024   2024 
   CNY   CNY   CNY   US$ 
                 
Wages, salaries and allowances   1,042    1,073    1,126    154 
Housing funds (a)   16    12    49    7 
Contribution to pension plans (a)   67    70    42    6 
Welfare and other expenses   46    37    34    5 
                     
Total employee benefits   1,171    1,192    1,251    172 

 

  (a) According to the Mainland China state regulations, the employees of the Group's subsidiaries which operate in Mainland China are required to participate in a central pension scheme operated by the local municipal government and government-sponsored housing funds. These subsidiaries are required to contribute a certain percentage of their payroll costs for those qualified urban employees to the central pension scheme as well as to housing funds.