Summary of significant accounting policies - Schedule of Translation of Amounts (Details) |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Period End Redminbi [Member] | ||
| Intra-Entity Foreign Currency Balance [Line Items] | ||
| Period exchange rate | 0.06898 | 0.072567 |
| Period Average Redminbi [Member] | ||
| Intra-Entity Foreign Currency Balance [Line Items] | ||
| Period exchange rate | 0.071019 | 0.072163 |