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INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2022
Notes and other explanatory information [abstract] |
INTANGIBLE ASSETS |
12. |  | INTANGIBLE ASSETS
Schedule of Intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Patent |  |  | Concession right |  |  | Software |  |  | Total |
|  |  | CNY |  |  |  | CNY |  |  |  | CNY |  |  |  | CNY |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of January 1, 2021 |  |  | 22,878 |  |  |  | — |  |  |  | 274 |  |  |  | 23,152 |
Transfer in |  |  | — |  |  |  | 20,430 |  |  |  | — |  |  |  | 20,430 |
As of December 31, 2021 |  |  | 22,878 |  |  |  | 20,430 |  |  |  | 274 |  |  |  | 43,582 |
Accumulated amortization and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of January 1, 2021 |  |  | (22,388 | ) |  |  | — |  |  |  | (121 | ) |  |  | (22,509 | )
Amortization charge |  |  | (105 | ) |  |  | (730 | ) |  |  | (49 | ) |  |  | (884 | )
As of December 31, 2021 |  |  | (22,493 | ) |  |  | (730 | ) |  |  | (170 | ) |  |  | (23,393 | )
Net carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of January 1, 2021 |  |  | 490 |  |  |  | — |  |  |  | 153 |  |  |  | 643 |
As of December 31, 2021 |  |  | 385 |  |  |  | 19,700 |  |  |  | 104 |  |  |  | 20,189 |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of January 1, 2022 |  |  | 22,878 |  |  |  | 20,430 |  |  |  | 274 |  |  |  | 43,582 |
Additions |  |  | — |  |  |  | — |  |  |  | 5 |  |  |  | 5 |
As of December 31, 2022 |  |  | 22,878 |  |  |  | 20,430 |  |  |  | 279 |  |  |  | 43,587 |
Accumulated amortization and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of January 1, 2022 |  |  | (22,493 | ) |  |  | (730 | ) |  |  | (170 | ) |  |  | (23,393 | )
Amortization charge |  |  | (36 | ) |  |  | (730 | ) |  |  | (47 | ) |  |  | (813 | )
As of December 31, 2022 |  |  | (22,529 | ) |  |  | (1,460 | ) |  |  | (217 | ) |  |  | (24,206 | )
Net carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of December 31, 2022 |  |  | 349 |  |  |  | 18,970 |  |  |  | 62 |  |  |  | 19,381 |
As of December 31, 2022 (US$) |  |  | 51 |  |  |  | 2,750 |  |  |  | 9 |  |  |  | 2,810 |
As of December 31, 2021 and 2022, the Group’s concession rights and assets associated with the environmental water projects (comprising intangible asset, contract assets and trade receivables) with aggregate gross carrying amounts of CNY129,437 and CNY139,060 (US$20,160), respectively, were pledged to secure bank loans from Bank of Communications with outstanding balances of CNY77,000 and CNY74,000 (US$10,728), respectively. Please refer to Note 21 for further details. There was no impairment loss on intangible assets for the years ended December 31, 2020, 2021 and 2022.

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