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TRADE RECEIVABLE | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022
Trade Receivable |  |
TRADE RECEIVABLE |
| 10. | TRADE RECEIVABLE
Schedule of trade receivables |  |  |  |  |  |  |  |  |  |  |  |
|  | December 31, |  |  | June 30, |
|  | 2022 |  |  | 2023 |  |  | 2023 |
|  | CNY |  |  | CNY |  |  | US$ |
|  | (Audited) |  |  | (Unaudited) |  |  | (Unaudited) |
Non-current |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables from third parties |  |  | 13,128 |  |  |  | 8,460 |  |  |  | 1,166 |
Less: Impairment allowance |  |  | (2,608 | ) |  |  | (3,746 | ) |  |  | (516 | )
Total of Non-current trade receivables |  |  | 10,520 |  |  |  | 4,714 |  |  |  | 650 |
Current |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables from service concession agreement |  |  | 22,927 |  |  |  | 29,276 |  |  |  | 4,036 |
Trade receivables from construction contracts |  |  | 34,850 |  |  |  | 37,265 |  |  |  | 5,137 |
Less: Impairment allowance |  |  | (11,017 | ) |  |  | (10,267 | ) |  |  | (1,415 | )
Total of current trade receivables |  |  | 46,760 |  |  |  | 56,274 |  |  |  | 7,758 |
Total |  |  | 57,280 |  |  |  | 60,988 |  |  |  | 8,408 |
An aging analysis of the trade receivables as of the end of the reporting period, based on the invoice date and net of loss allowance, is as follows:
Schedule of aging analysis of the trade receivables |  |  |  |  |  |  |  |  |
|  | December 31, |  |  | June 30, |
|  | 2022 |  |  | 2023 |  |  | 2023 |
|  | CNY |  |  | CNY |  |  | US$ |
|  | (Audited) |  |  | (Unaudited) |  |  | (Unaudited) |
Within 1 year |  |  | 18,401 |  |  |  | 14,577 |  |  |  | 2,010 |
Between 1-2 years |  |  | 13,896 |  |  |  | 13,058 |  |  |  | 1,800 |
Between 2-3 years |  |  | 4,518 |  |  |  | 11,860 |  |  |  | 1,635 |
Over 3 years |  |  | 20,465 |  |  |  | 21,493 |  |  |  | 2,963 |
Total |  |  | 57,280 |  |  |  | 60,988 |  |  |  | 8,408 |
Movements of loss allowance during the year/period are analyzed as follows:
Schedule of loss allowance for trade receivables |  |  |  |  |  |  |  |  |
|  | Year Ended December 31, |  |  | Six Months Ended June 30, |
|  | 2022 |  |  | 2023 |  |  | 2023 |
|  | CNY |  |  | CNY |  |  | US$ |
|  | (Audited) |  |  | (Unaudited) |  |  | (Unaudited) |
Beginning of the year/period |  |  | 17,614 |  |  |  | 13,625 |  |  |  | 1,878 |
Provision for expected credit losses (“ECLs”) |  |  | (3,989 | ) |  |  | 388 |  |  |  | 53 |
End of the year/period |  |  | 13,625 |  |  |  | 14,013 |  |  |  | 1,931 |
The Group elected to apply the simplified approach for providing impairment for ECLs prescribed by IFRS 9, which permits the use of the lifetime expected loss provision for all trade receivables. To measure ECLs, trade receivables were classified according to the characteristics of shared credit risk and days past due. The ECLs below also incorporate forward looking information. The impairment as of December 31, 2022 and June 30, 2023 was determined as follows:
Schedule of impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  |  |  | Past Due |
|  | Current |  |  | within 1 years |  |  | 1-2 years |  |  | 2-3 years |  |  | over 3 years |  |  | Total |
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 | (i) |  |  | 13,625 |
As of June 30, 2023: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected credit loss rate |  |  |  |  |  |  | 0 | % |  |  | 0 | % |  |  | 12 | % |  |  | 36 | % |  |  | 19 | %
Gross carrying amount (CNY) |  |  | 335 |  |  |  | 14,291 |  |  |  | 13,062 |  |  |  | 13,474 |  |  |  | 33,839 |  |  |  | 75,001 |
Impairment allowances (CNY) |  |  | — |  |  |  | 49 |  |  |  | 4 |  |  |  | 1,614 |  |  |  | 12,346 | (i) |  |  | 14,013 |
Impairment allowances (US$) |  |  | — |  |  |  | 7 |  |  |  | 1 |  |  |  | 222 |  |  |  | 1,701 |  |  |  | 1,931 |
(i) | The impairment allowances included an amount of CNY4,600 and CNY4,619 (US$637) as of December 31, 2022 and June 30, 2023, respectively, for specific trade receivables which were considered to be in default due to conditions which indicated that the Group was unlikely to receive the outstanding contractual amounts in full.
14. |  | TRADE RECEIVABLES TRADE RECEIVABLE
Schedule of Trade Receivables |  |  |  |  |  |  |  |  |
|  | December 31, |
|  | 2021 |  |  | 2022 |  |  | 2022 |
|  | CNY |  |  | CNY |  |  | US$ |
Non-current |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables from construction contracts |  |  | 17,033 |  |  |  | 13,128 |  |  |  | 1,904 |
Less: Impairment allowance |  |  | (7,532 | ) |  |  | (2,608 | ) |  |  | (379 | )
Total of Non-current trade receivables |  |  | 9,501 |  |  |  | 10,520 |  |  |  | 1,525 |
Current |  |  |  |  |  |  |  |  |  |  |  |
Trade receivables from service concession agreement |  |  | 11,252 |  |  |  | 22,927 |  |  |  | 3,324 |
Trade receivables from construction contracts |  |  | 40,356 |  |  |  | 34,850 |  |  |  | 5,052 |
Less: Impairment allowance |  |  | (10,082 | ) |  |  | (11,017 | ) |  |  | (1,597 | )
Total of current trade receivables |  |  | 41,526 |  |  |  | 46,760 |  |  |  | 6,779 |
Total |  |  | 51,027 |  |  |  | 57,280 |  |  |  | 8,304 |
The Group’s trade receivables arise from the provision of construction services for wastewater treatment projects, sale of wastewater treatment equipment, and operation service of the service concession arrangement. The majority of the Group’s customers are town/village government entities or main contractors of the governmental infrastructure projects whose time of payment for the service or goods received from the Group depend on the appropriation and approval of the fiscal funds. Accordingly, the Group granted various credit terms to different customers, depending on the nature and background of the customers and projects. The Group generally granted customers a credit period of one month to three months, except for some of the customers for construction services, sales of wastewater treatment equipment and maintenance services who will generally settle the amounts owed to the Group in a number of specified installments covering periods ranging from one year to five years. Apart from the trade receivables related to the service concession arrangement which bear no interest, the trade receivables of construction services, operation and maintenance services and sale of wastewater treatment equipment bear an imputed interest rate of 4.75% per annum. An aging analysis of the trade receivables as of the end of the reporting period, based on the invoice date and net of loss allowance, is as follows:
Schedule of Aging Analysis of Trade Receivables |  |  |  |  |  |  |  |  |
|  | December 31, |
|  | 2021 |  |  | 2022 |  |  | 2022 |
|  | CNY |  |  | CNY |  |  | US$ |
Within 1 year |  |  | 19,026 |  |  |  | 18,401 |  |  |  | 2,667 |
Between 1-2 years |  |  | 5,106 |  |  |  | 13,896 |  |  |  | 2,015 |
Between 2-3 years |  |  | 12,796 |  |  |  | 4,518 |  |  |  | 655 |
Over 3 years |  |  | 14,099 |  |  |  | 20,465 |  |  |  | 2,967 |
Total |  |  | 51,027 |  |  |  | 57,280 |  |  |  | 8,304 |
The movement in the loss allowance for trade receivables during the years indicated are as follows:
Schedule of the movement in the loss allowance for trade receivables |  |  |  |  |  |  |  |  |
|  | December 31, |
|  | 2021 |  |  | 2022 |  |  | 2022 |
|  | CNY |  |  | CNY |  |  | US$ |
Beginning of the year |  |  | 13,774 |  |  |  | 17,614 |  |  |  | 2,554 |
(Reversal)/provision for expected credit losses, net |  |  | 3,840 |  |  |  | (3,989 | ) |  |  | (578 | )
End of the year |  |  | 17,614 |  |  |  | 13,625 |  |  |  | 1,976 |
A decrease in the loss allowance of CNY3,992 (US$579) (2021: increase CNY3,839) was the result of a net decrease (2021: a net increase) in the gross carrying amount after the settlement of trade receivables of construction contracts and origination of new trade receivables of construction contracts. The Group elected to apply the simplified approach for providing impairment for ECLs prescribed by IFRS 9, which permits the use of the lifetime expected loss provision for all trade receivables. To measure the ECLs, trade receivables were grouped based on the shared credit risk characteristics and the days past due. The ECLs below also incorporate forward-looking information. The impairment as of December 31, 2021 and 2022 was determined as follows:
Schedule of impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  |  | Past due |
|  |  | Current |  |  |  | Within 1 year |  |  |  | 1-2 years |  |  |  | 2-3 years |  |  |  | Over 3 years |  |  |  | Total |
As of December 31, 2021: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected credit loss rate: |  |  |  |  |  |  | 6 | % |  |  | 26 | % |  |  | 13 | % |  |  | 48 | % |  |  | 26 | %
Gross carrying amount (CNY) |  |  | 3,670 |  |  |  | 16,311 |  |  |  | 6,865 |  |  |  | 14,712 |  |  |  | 27,083 |  |  |  | 68,641 |
Impairment allowances (CNY) |  |  |  |  |  |  | 955 |  |  |  | 1,759 |  |  |  | 1,916 | (i) |  |  | 12,984 | (ii) |  |  | 17,614 |
As of December 31, 2022: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Expected credit loss rate: |  |  |  |  |  |  | 0 | % |  |  | 9 | % |  |  | 29 | % |  |  | 34 | % |  |  | 19 | %
Gross carrying amount (CNY) |  |  | — |  |  |  | 18,406 |  |  |  | 15,195 |  |  |  | 6,399 |  |  |  | 30,905 |  |  |  | 70,905 |
Impairment allowances (CNY) |  |  |  |  |  |  | 5 |  |  |  | 1,299 |  |  |  | 1,881 |  |  |  | 10,440 | (ii) |  |  | 13,625 |
Impairment allowances (US$) |  |  |  |  |  |  | 1 |  |  |  | 188 |  |  |  | 273 |  |  |  | 1,514 |  |  |  | 1,976 |
| (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 CNY4,646 and CNY4,600 (US$667) as of December 31, 2021 and 2022, respectively, 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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