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Advances to Suppliers, Net (Tables)
12 Months Ended
Dec. 31, 2021
Advances to Suppliers, Net [Abstract]  
Schedule of advances to suppliers
  

December 31,

2021

  

December 31,

2020

 
Raw material prepayments for equipment production  $751,409    1,203,450 
Land reclamation prepayments   472,640    469,460 
Advances to construction subcontractors   23,394    427,219 
Total:   1,247,443    2,100,129 
Less: allowances for doubtful accounts   (965,843)   (1,112,373)
Advances to suppliers, net, third parties  $281,600    987,756 

 

Schedule of changes of allowance for doubtful accounts
  

December 31,

2021

  

December 31,

2020

 
Beginning balance  $1,112,374    439,738 
Bad debt provision   259,861    636,625 
Write off   (428,553)   
-
 
Foreign exchange translation   22,161    36,010 
Ending balance  $965,843    1,112,373