| Accounts Receivable, net |
3.Accounts Receivable, net Accounts receivable, net, consisted of the following: | | | | | | | | | As of December 31, | | | 2023 | | 2024 | | 2025 | | | US$ | | US$ | | US$ | Accounts receivable | | 2,378,341 | | 2,949,667 | | 1,852,815 | Allowance for credit losses: | | | | | | | Balance at beginning of the year | | (159,414) | | (43,734) | | (89,130) | (Additions) reversal provisions | | 90,526 | | (47,801) | | 39,476 | Write-off | | 22,922 | | 2,249 | | — | Foreign exchange effect | | 2,232 | | 156 | | (262) | Balance at end of the year | | (43,734) | | (89,130) | | (49,916) | Accounts receivable, net | | 2,334,607 | | 2,860,537 | | 1,802,899 |
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