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Intangible Assets, Net | 12 Months Ended
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Dec. 31, 2024
Intangible Assets, Net [Abstract] |
Intangible Assets, net |
| 12. | Intangible Assets, net
Intangible assets as of December 31, 2023 and 2024 consisted of the followings:
|  | December 31, 2023 |  |  | December 31, 2024 |
Computer software at cost |  | $ | 139,732 |  |  | $ | 169,054 |
Sewage discharge permit |  |  | 1,715,450 |  |  |  | 1,667,907 |
|  |  | 1,855,182 |  |  |  | 1,836,961 |
Accumulated amortization |  |  | (1,013,822 | ) |  |  | (1,453,999 | )
|  | $ | 841,360 |  |  | $ | 382,962 |
Amortization expenses were $472,980 and $470,219 for the years ended December 31, 2023 and 2024, respectively. Total future amortization expenses for finite-lived intangible assets were estimated as follows:
2025 |  | $ | 314,081 |
2026 |  |  | 16,191 |
2027 |  |  | 11,323 |
2028 |  |  | 8,231 |
2029 |  |  | 8,187 |
Thereafter |  |  | 24,949 |
Total |  | $ | 382,962 |
No impairment loss was made to the carrying amounts of the intangible assets for the years ended December 31, 2023 and 2024.

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