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Intangible assets, net (Tables) | 12 Months Ended
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Dec. 31, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of intangible assets, net | Intangible assets, net as of December 31, 2025 and 2024 consisted of the following: Schedule of intangible assets, net
|  | 2025 |  |  | 2024 |
|  | December 31, |
|  | 2025 |  |  | 2024 |
|  | US$ |  |  | US$ |
Developed technologies |  |  | 5,853,354 |  |  |  | 5,853,354 |
Trade names and trademarks |  |  | 7,043,640 |  |  |  | 7,043,640 |
Total |  |  | 12,896,994 |  |  |  | 12,896,994 |
Less: accumulated amortization |  |  | (11,051,434 | ) |  |  | (9,510,877 | )
Intangible assets, net |  |  | 1,845,560 |  |  |  | 3,386,117 |
Schedule of estimated future amortization expense | As of December 31, 2025, the estimated future amortization expense for each of the next five years and thereafter was as follows: Schedule of estimated future amortization expense
|  | Amortization |
|  |  | US$ |
For the year ending December 31, |  |  |  |
2026 |  |  | 1,540,557 |
2027 |  |  | 305,003 |
2028 |  |  | — |
Thereafter |  |  | — |
Total |  |  | 1,845,560 |

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