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Intangible Assets, Net
 9 Months Ended
Sep. 30, 2025
Intangible Assets, Net [Abstract]  
Intangible Assets, net
11.Intangible Assets, net

 

Intangible assets as of December 31, 2024 and September 30, 2025 consisted of the followings:

 

   December 31,
2024		   September 30,
2025		 
Computer software at cost  $169,054   $173,297 
Sewage discharge permit   1,667,907    1,709,765 
    1,836,961    1,883,062 
Accumulated amortization   (1,453,999)   (1,808,160)
   $382,962   $74,902 

 

Amortization expenses were $118,987 and $80,357 for the three months ended September 30, 2024 and 2025, respectively.

 

Amortization expenses were $352,481 and $313,430 for the nine months ended September 30, 2024 and 2025, respectively.

 

Total future amortization expenses for finite-lived intangible assets were estimated as follows:

 

Remainder of 2025  $4,293 
2026   16,597 
2027   10,675 
2028   9,082 
2029   8,680 
Thereafter   25,575 
Total  $74,902 

 

No impairment loss was made to the carrying amounts of the intangible assets for the three and nine months ended September 30, 2024 and 2025.