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PROFIT/(LOSS) BEFORE INCOME TAX (Details)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Dec. 31, 2022
CNY (¥)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Dec. 31, 2022
CNY (¥)
Profitloss Before Income Tax          
Finance income (Note 5) | ¥   ¥ (15,607) ¥ (16,935) ¥ (15,468)  
Finance income (Note 5) | $ $ (2,263)        
- Sales of cooper ores 6,854  
- Sales of water treatment equipment 14 94  
- Construction service 1,244 8,580 12,876 6,479  
- Opeartion and maintenance services 162 3,177  
- Operation services related to service concession arrangement 842 5,811 5,067 3,878  
- Construction services related to service concession arrangement 389 18,827  
Cost of sales 2,100 14,485 18,494 39,215  
- Property, plant and equipment (Note 11) 44 304 510 565  
- Right-of-use assets (Note 13) 205 1,413 1,366 1,663  
Amortization of intangible assets* (Note 12) [1] 118 813 884 156  
Expense relating to short-term leases (Note 13) 71 490 601 496  
Impairment losses/(reversal) on financial assets:          
- Trade receivables (578) (3,989) 3,840 4,544  
- Contract assets 25 171 357 172  
- Other receivables 397 2,745 239  
- Amount due from related companies (1,106) (554)  
- Financial assets at fair value through profit or loss | ¥   45,816 (31,334)  
- Financial assets at fair value through profit or loss | $        
- Derivative financial liabilities (Note 22 (b)) (146) (1,007) (7,467)  
Consultants share option expense (Note 27) | ¥   16,152  
Expense relating to consultant service reward (Note 27) | $ 2,342        
Issuance expense related to placement 1,579  
Other (income)/losses (131) (904) 183 (1,616)  
Finance costs (Note 5) 492 3,395 4,359 3,749  
Employee benefit expenses* (Note 7) [2] 1,535 10,587 11,496 11,412  
Intangible assets 111   835 115 ¥ 766
Administrative expenses 7 47 49 41  
Employee benefit expenses 206 1,418 2,772 3,371  
Selling and distribution expenses 16 111 159 238  
Profit or loss $ 1,313 ¥ 9,058 ¥ 8,565 ¥ 7,803  
[1] The amortization of intangible assets allocated to cost of sales amounted to CNY115, CNY835 and CNY766 (US$111) and administrative expenses amounted to CNY41, CNY49 and CNY47 (US$7) on the face of the consolidated statements of profit or loss for the years ended December 31, 2020, 2021 and 2022.
[2] The employee benefit expenses allocated to cost of sales amounted to CNY3,371, CNY2,772 and CNY1,418 (US$206), selling and distribution expenses amounted to CNY238, CNY159, CNY111 (US$16) and administrative expenses amounted to CNY7,803, CNY8,565 and CNY9,058 (US$1,313) on the face of the consolidated statements of profit or loss for the years ended December 31, 2020, 2021 and 2022.