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TRADE RECEIVABLES (Tables) | 12 Months Ended
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Dec. 31, 2023
Trade Receivables |
Schedule of trade receivables |
Schedule of trade receivables |  |  |  |  |  |  |  |  |
|  | December 31, |
|  | 2022 |  |  | 2023 |  |  | 2023 |
|  | CNY |  |  | CNY |  |  | US$ |
Non-current |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables from construction contracts |  |  | 13,128 |  |  |  | — |  |  |  | — |
Less: Impairment allowance |  |  | (2,608 | ) |  |  | — |  |  |  | — |
Total of Non-current trade receivables |  |  | 10,520 |  |  |  | — |  |  |  | — |
Current |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables from service concession agreement |  |  | 22,927 |  |  |  | — |  |  |  | — |
Trade receivables from construction contracts |  |  | 34,850 |  |  |  | — |  |  |  | — |
Less: Impairment allowance |  |  | (11,017 | ) |  |  | — |  |  |  | — |
Total of current trade receivables |  |  | 46,760 |  |  |  | — |  |  |  | — |
Total |  |  | 57,280 |  |  |  | — |  |  |  | — |
Schedule of aging analysis of trade receivables |
Schedule of aging analysis of trade receivables |  |  |  |  |  |  |  |  |
|  | December 31, |
|  | 2022 |  |  | 2023 |  |  | 2023 |
|  | CNY |  |  | CNY |  |  | US$ |
Within 1 year |  |  | 18,401 |  |  |  | — |  |  |  | — |
Between 1-2 years |  |  | 13,896 |  |  |  | — |  |  |  | — |
Between 2-3 years |  |  | 4,518 |  |  |  | — |  |  |  | — |
Over 3 years |  |  | 20,465 |  |  |  | — |  |  |  | — |
Total |  |  | 57,280 |  |  |  | — |  |  |  | — |
Schedule of the movement in the loss allowance for trade receivables |
Schedule of the movement in the loss allowance for trade receivables |  |  |  |  |  |  |  |  |
|  | December 31, |
|  | 2022 |  |  | 2023 |  |  | 2023 |
|  | CNY |  |  | CNY |  |  | US$ |
Beginning of the year |  |  | 17,614 |  |  |  | 13,625 |  |  |  | 1,925 |
(Reversal)/provision for expected credit losses, net |  |  | (3,989 | ) |  |  | 383 |  |  |  | 54 |
Disposal of PSTT |  |  | — |  |  |  | (14,008 | ) |  |  | (1,979 | )
End of the year |  |  | 13,625 |  |  |  | — |  |  |  | — |
Schedule of impairment |
Schedule of impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | Past due |
|  |  | Current |  |  |  | Within 1 year |  |  |  | 1-2 years |  |  |  | 2-3 years |  |  |  | Over 3 years |  |  |  | Total |
As of December 31, 2021: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected credit loss rate: |  |  | — |  |  |  | 6 | % |  |  | 26 | % |  |  | 13 | % |  |  | 48 | % |  |  | 26 | %
Gross carrying amount (CNY) |  |  | 3,670 |  |  |  | 16,311 |  |  |  | 6,865 |  |  |  | 14,712 |  |  |  | 27,083 |  |  |  | 68,641 |
Impairment allowances (CNY) |  |  | — |  |  |  | 955 |  |  |  | 1,759 |  |  |  | 1,916 | (i) |  |  | 12,984 | (ii) |  |  | 17,614 |
As of December 31, 2022: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected credit loss rate: |  |  | — |  |  |  | 0 | % |  |  | 9 | % |  |  | 29 | % |  |  | 34 | % |  |  | 19 | %
Gross carrying amount (CNY) |  |  | — |  |  |  | 18,406 |  |  |  | 15,195 |  |  |  | 6,399 |  |  |  | 30,905 |  |  |  | 70,905 |
Impairment allowances (CNY) |  |  | — |  |  |  | 5 |  |  |  | 1,299 |  |  |  | 1,881 |  |  |  | 10,440 | (ii) |  |  | 13,625 |
| (i) | The impairment allowances included CNY221 as of December 31, 2021, for specific trade receivables which were considered to be in default due to conditions which indicated that the Group was unlikely to receive the outstanding contractual amounts in full.
| (ii) | The impairment allowances included an amount of CNY4,600 and nil as of December 31, 2022 for specific trade receivables which were considered to be in default due to conditions which indicated that the Group was unlikely to receive the outstanding contractual amounts in full.

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