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Intangible Assets, net (Tables)
3 Months Ended
Mar. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of intangible assets
   December 31,
2021
   March 31,
2022
 
Computer software at cost  $108,560   $108,801 
Sewage discharge permit*    1,915,740     1,919,970 
     2,024,300    2,028,771 
Accumulated amortization    (62,561)   (194,420)
   $1,961,739   $1,834,351 

 

Schedule of finite-lived intangible assets
Remainder of 2022  $396,837 
2023   527,641 
2024   526,166 
2025   351,785 
2026   8,350 
Thereafter   23,572 
Total  $1,834,351