Material accounting policies - Property, plant and equipment (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2024 | |
| Office equipment | |
| Significant accounting policies | |
| Estimated useful lives of property, plant and equipment | 3 years |
| Plant and Machinery | |
| Significant accounting policies | |
| Estimated useful lives of property, plant and equipment | 5 years |
| Vehicles | |
| Significant accounting policies | |
| Estimated useful lives of property, plant and equipment | 10 years |