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Acquisition of a subsidiary and Hitrans Loan (Tables)
 9 Months Ended
Sep. 30, 2021
Business Combinations [Abstract]  
Schedule of acquisition of a subsidiary
   December 31,   September 30, 
   2020   2021 
Deposits paid for acquisition of a subsidiary  $
          -
   $8,349,118 

 
Schedule of hitrans Loan
   December 31,   September 30, 
   2020   2021 
Hitrans Loan  $
                 -
   $20,326,775