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Intangible Assets, Net
 6 Months Ended
Jun. 30, 2023
Intangible Assets, net [Abstract]  
Intangible Assets, net

10. Intangible Assets, net

 

Intangible assets as of December 31, 2022 and June 30, 2023 consisted of the followings:

 

   December 31,
2022		   June 30,
2023		 
Computer software at cost  $104,211   $99,260 
Sewage discharge permit*   1,762,129    1,678,416 
　   1,866,340    1,777,676 
Accumulated amortization   (557,282)   (760,505)
　  $1,309,058   $1,017,171 

 

Amortization expenses were $144,508 and $118,906 for the three months ended June 30, 2022 and 2023, respectively.

 

Amortization expenses were $276,079 and $240,660 for the six months ended June 30, 2022 and 2023, respectively.

  

Total future amortization expenses for finite-lived intangible assets as of June 30, 2023 were estimated as follows:

 

Remainder of 2023  $229,556 
2024   457,963 
2025   305,522 
2026   5,755 
2027   4,313 
Thereafter   14,062 
Total  $1,017,171