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REVENUE FROM CONTRACTS WITH CUSTOMERS (Tables) | 12 Months Ended
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Dec. 31, 2022
Revenue From Contracts With Customers |
Schedule of revenue from contracts with customers |
Schedule of revenue from contracts with customers |  |  |  |  |  |  |  |  |
|  | Year Ended December 31, 2020 |
|  | Wastewater treatment |  |  | Exploration and mining |  |  | Total |
|  | CNY |  |  | CNY |  |  | CNY |
Segments |  |  |  |  |  |  |  |  |
Type of goods or services |  |  |  |  |  |  |  |  |
Sales of copper ores |  |  | — |  |  |  | 6,867 |  |  |  | 6,867 |
Construction contract revenue |  |  | 7,665 |  |  |  | — |  |  |  | 7,665 |
Operation and maintenance services |  |  | 3,561 |  |  |  | — |  |  |  | 3,561 |
Operation services of service concession arrangement |  |  | 2,295 |  |  |  | — |  |  |  | 2,295 |
Construction services of service concession arrangement |  |  | 22,110 |  |  |  | — |  |  |  | 22,110 |
Total revenue from contracts with customers |  |  | 35,631 |  |  |  | 6,867 |  |  |  | 42,498 |
Geographic market |  |  |  |  |  |  |  |  |  |  |  |
Mainland China |  |  | 35,631 |  |  |  | 6,867 |  |  |  | 42,498 |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |
At a point in time |  |  | — |  |  |  | 6,867 |  |  |  | 6,867 |
Over time |  |  | 35,631 |  |  |  | — |  |  |  | 35,631 |
Total revenue from contracts with customers |  |  | 35,631 |  |  |  | 6,867 |  |  |  | 42,498 |
|  | Year Ended December 31, 2021 |
|  | Wastewater treatment |  |  | Exploration and mining |  |  | Total |
|  | CNY |  |  | CNY |  |  | CNY |
Segments |  |  |  |  |  |  |  |  |
Type of goods or services |  |  |  |  |  |  |  |  |
Construction contract revenue |  |  | 12,203 |  |  |  | — |  |  |  | 12,203 |
Operation and maintenance services |  |  | 183 |  |  |  | — |  |  |  | 183 |
Operation services of service concession arrangement |  |  | 5,953 |  |  |  | — |  |  |  | 5,953 |
Construction services of service concession arrangement |  |  | 396 |  |  |  | — |  |  |  | 396 |
Total revenue from contracts with customers |  |  | 18,735 |  |  |  | — |  |  |  | 18,735 |
Geographic market |  |  |  |  |  |  |  |  |  |  |  |
Mainland China |  |  | 18,735 |  |  |  | — |  |  |  | 18,735 |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |
Over time |  |  | 18,735 |  |  |  | — |  |  |  | 18,735 |
Total revenue from contracts with customers |  |  | 18,735 |  |  |  | — |  |  |  | 18,735 |
|  | Year Ended December 31, 2022 |
|  | Wastewater treatment |  |  | Exploration and mining |  |  | Total |  |  | Total |
|  | CNY |  |  | CNY |  |  | CNY |  |  | US$ |
Segments |  |  |  |  |  |  |  |  |  |  |  |
Type of goods or services |  |  |  |  |  |  |  |  |  |  |  |
Construction contract revenue |  |  | 14,633 |  |  |  | — |  |  |  | 14,633 |  |  |  | 2,122 |
Sales of wastewater treatment equipment |  |  | 161 |  |  |  | — |  |  |  | 161 |  |  |  | 23 |
Operation services of service concession arrangement |  |  | 5,512 |  |  |  | — |  |  |  | 5,512 |  |  |  | 799 |
Total revenue from contracts with customers |  |  | 20,306 |  |  |  | — |  |  |  | 20,306 |  |  |  | 2,944 |
Geographic market |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mainland China |  |  | 20,306 |  |  |  | — |  |  |  | 20,306 |  |  |  | 2,944 |
Timing of revenue recognition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
At a point in time |  |  | 161 |  |  |  | — |  |  |  | 161 |  |  |  | 23 |
Over time |  |  | 20,145 |  |  |  | — |  |  |  | 20,145 |  |  |  | 2,921 |
Total revenue from contracts with customers |  |  | 20,306 |  |  |  | — |  |  |  | 20,306 |  |  |  | 2,944 |
(i) Disaggregated revenue information
Schedule of the amounts of transaction prices allocated to the remaining performance obligations |
Schedule of the amounts of transaction prices allocated to the remaining performance obligations |  |  |  |  |  |  |  |  |
|  | December 31 |
|  | 2021 |  |  | 2022 |  |  | 2022 |
|  | CNY |  |  | CNY |  |  | US$ |
Amounts expected to be recognized as revenue: |  |  |  |  |  |  |  |  |  |  |  |
Within one year |  |  | 17,774 |  |  |  | 16,406 |  |  |  | 2,378 |
After one year |  |  | 183,114 |  |  |  | 172,683 |  |  |  | 25,034 |
Amounts expected in Revenues |  |  | 200,888 |  |  |  | 189,089 |  |  |  | 27,412 |

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