XML 61 R36.htm IDEA: XBRL DOCUMENT v3.21.1
Prepayments and Other Current Assets (Tables)
 12 Months Ended
Dec. 31, 2020
Prepaid Expenses And Other Current Assets Disclosure [Abstract]  
Schedule of prepayments and other current assets
   December 31,   December 31, 
   2020   2019 
Prepaid land lease  $183,912   $301,023 
Prepayment for purchase of materials   10,945    5,394,297 
Value-added tax recoverable   5,864,989    5,666,975 
Others   991,669    250,946 
   $7,051,515   $11,613,241