Summary of principal accounting policies (Details) |
Sep. 30, 2025 |
Mar. 31, 2025 |
|---|---|---|
| Computer Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives | 3 years | 3 years |
| Vehicles [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives | 4 years | 4 years |
| Minimum [Member] | Leasehold Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives | 2 years | 2 years |
| Minimum [Member] | Furniture and Fixtures [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives | 3 years | 3 years |
| Maximum [Member] | Leasehold Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives | 5 years | 5 years |
| Maximum [Member] | Furniture and Fixtures [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Estimated useful lives | 5 years | 5 years |