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Bank Loans (Tables)
9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Schedule of bank loans
   September 30,
2021
   December 31,
2020
 
Mortgage loan  $4,949,892   $5,064,142 
Line of revolving loan   5,567,564    6,322,417 
           
Total bank loans  $10,517,456   $11,386,559 
           
Reclassifying as:          
Current portion  $5,691,225   $6,446,139 
Long-term portion (more than 12 months)   4,826,231    4,940,420 
           
Total bank loans  $10,517,456   $11,386,559