13. Financial Income, net | | | | | | | | | Year Ended December 31, | | | 2023 | | 2024 | | 2025 | | | US$ | | US$ | | US$ | Interest income and investment income, net (1) | | 45,052 | | 50,424 | | 43,376 | Fair value change of short-term investments | | 54 | | (116) | | 760 | Fair value change of long-term investments | | (130) | | (41) | | 43 | Gain on disposal of long-term investment | | — | | 451 | | — | Total financial income, net | | 44,976 | | 50,718 | | 44,179 |
| (1) | Interest income and investment income, net included interest income and investment income of US$49,744, US$50,424 and US$43,376, as well as investment loss from forward exchange contracts of US$4,692, nil and nil, for the years ended December 31, 2023, 2024 and 2025, respectively. |
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