Accounts receivable, net (Details 1) - USD ($) |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| Credit Loss [Abstract] | ||
| Beginning balance | $ 332,334 | $ 360,701 |
| Addition | 132 | 74,175 |
| Reverse | (64,769) | (117,141) |
| Foreign exchange adjustment | 9,451 | 14,599 |
| Ending balance | $ 277,148 | $ 332,334 |