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Intangible assets, net (Tables) | 12 Months Ended
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Dec. 31, 2023
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Schedule of intangible assets, net | In determining the useful life of an intangible asset, the Group considers the factors such as the expected use of the asset by the Group, and any legal, regulatory, or contractual provisions that may limit the useful life:
Category |  | Estimated useful life
Software |  | 3 years
Software license rights |  | 3 years
Patent |  | 3 years
Trademarks |  | 10 years
Intangible assets, net consisted of the following:
| As of December 31,
| 2022 |  | 2023
| RMB |  | RMB
Software | 103,509 |  |  | 121,950 |
Software license rights | — |  |  | 143,725 |
Others | — |  |  | 2,794 |
Intangible assets | 103,509 |  |  | 268,469 |
Less: accumulated amortization | (58,648) |  |  | (86,183) |
Less: impairment provision | — |  |  | (2,945) |
Intangible assets, net | 44,861 |  |  | 179,341 |
Schedule of amortization expenses on intangible assets allocated to expense items | Amortization of intangible assets was allocated as follows:
| Year ended December 31,
| 2021 |  | 2022 |  | 2023
| RMB |  | RMB |  | RMB
Cost of revenues | 77 |  |  | — |  |  | 7,985 |
Selling, general and administrative expenses | 6,721 |  |  | 9,987 |  |  | 10,047 |
Research and development expenses | 15,089 |  |  | 14,045 |  |  | 13,808 |
Total amortization | 21,887 |  |  | 24,032 |  |  | 31,840 |
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | Estimated amortization expenses relating to the existing intangible assets with finite lives for the next five years is as follows:
| As of December 31,
| RMB
2024 | 68,895 |
2025 | 62,511 |
2026 | 46,802 |
2027 | 811 |
2028 | 253 |

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