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Prepayments and Other Current Assets (Tables)
 9 Months Ended
Sep. 30, 2020
Prepaid Expenses And Other Current Assets Disclosure [Abstract]  
Schedule of prepayments and other current assets
   September 30,   December 31, 
   2020   2019 
Prepaid land lease  $176,210   $301,023 
Prepayment for purchase of materials   2,615,556    5,394,297 
Value-added tax recoverable   5,619,369    5,666,975 
Others   1,519,127    250,946 
   $9,930,262   $11,613,241