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OTHER RECEIVABLES (Tables)
 12 Months Ended
Dec. 31, 2023
Notes and other explanatory information [abstract]  
Schedule of other receivables
             
   December 31, 
   2022   2023   2023 
   CNY   CNY   US$ 
             
Financial assets               
Loans to an unrelated company (i)   83,600    —    — 
Deposits   790    3    — 
Others   1,000    —    — 
Financials asset   85,390    3    — 
                
Staff advance   237    12    3 
Others   90    3    — 
Total amount   327    15    3 
                
Impairment allowance   (2,984)   —    — 
                
Total   82,733    18    3 

 

(i)The balance as of December 31, 2022 consisted of a loan in the amount of CNY80,000 (US$11,599) and the corresponding interest receivable amounted to CNY 3,600 (US$521) from Shenzhen Qianhai, a subsidiary of the Company, to an unrelated company, Shenzhen Chaopeng Investment Co., Ltd. The loan was originally provided on June 30, 2021, and will mature in one year. On June 30, 2022, the loan was extended for another year to June 30, 2023. The loan is interest-bearing at a rate of 9% per annum and guaranteed by Shenzhen Feishang Investment Co., Limited, a company unrelated to the Group. During year 2023, the loan was derecognized as it was part of the wastewater treatment segment which was disposed by the Company (Note 3).
Schedule of movements in the loss allowance for other receivables
             
   December 31, 
   2022   2023   2023 
   CNY   CNY   US$ 
             
Beginning of the year   239    2,984    423 
Provision for expected credit losses, net   2,745    6,003    848 
Disposal of PSTT   —    (8,987)   (1,271)
                
End of the year   2,984    —    —