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INTANGIBLE ASSETS | 12 Months Ended
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Dec. 31, 2023
Intangible Assets |
INTANGIBLE ASSETS |
10. |  | INTANGIBLE ASSETS
Schedule of Intangible assets |  |  |  |  |  |  |  |  |  |  |  |
|  | Patent |  |  | Concession right |  |  | Software |  |  | Total |
|  |  | CNY |  |  |  | CNY |  |  |  | CNY |  |  |  | CNY |
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$) |  |  | 51 |  |  |  | 2,750 |  |  |  | 9 |  |  |  | 2,810 |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of January 1, 2023 |  |  | 22,878 |  |  |  | 20,430 |  |  |  | 279 |  |  |  | 43,587 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Disposal of PSTT |  |  | (22,878 | ) |  |  | (20,430 | ) |  |  | (279 | ) |  |  | (43,587 | )
As of December 31, 2023 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Accumulated amortization and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of January 1, 2023 |  |  | (22,529 | ) |  |  | (1,460 | ) |  |  | (217 | ) |  |  | (24,206 | )
Amortization charge |  |  | (18 | ) |  |  | (425 | ) |  |  | (17 | ) |  |  | (460 | )
Disposal of PSTT |  |  | 22,547 |  |  |  | 1,885 |  |  |  | 234 |  |  |  | 24,666 |
As of December 31, 2023 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Net carrying amount |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
As of December 31, 2023 |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
As of December 31, 2023 (US$) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
There was no impairment loss on intangible assets for the years ended December 31, 2021, 2022 and 2023.

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