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Intangible Assets, Net
 9 Months Ended
Sep. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, net

10. Intangible Assets, net

 

Intangible assets as of December 31, 2021 and September 30, 2022 consisted of the followings:

 

   December 31,
2021		   September 30,
2022		 
Computer software at cost  $108,560   $96,954 
Sewage discharge permit*   　1,915,740    1,710,918 
　   　2,024,300    1,807,872 
Accumulated amortization   　(62,561)   (424,083)
　  $1,961,739   $1,383,789 

 

Amortization expenses were $1,613 and $121,035 for the three months ended September 30, 2021 and 2022, respectively.

 

Amortization expenses were $4,195 and $397,114 for the nine months ended September 30, 2021 and 2022, respectively.