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Prepayments and Other Current Assets
 6 Months Ended
Jun. 30, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Prepayments and other current assets

(5) Prepayments and other current assets

 

Prepayments and other current assets consisted of the following as of June 30, 2019 and December 31, 2018: 

 

   June 30,   December 31, 
   2019   2018 
Prepaid land lease  $165,825   $437,114 
Prepayment for purchase of materials   52,327    - 
Value-added tax recoverable   5,750,644    5,760,280 
Others   276,517    43,905 
   $6,245,313   $6,241,299