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Prepayments and other current assets (Details) - Schedule of prepayments and other current assets - USD ($)
Sep. 30, 2021
Dec. 31, 2020
Schedule of prepayments and other current assets [Abstract]    
Prepaid land lease $ 185,031 $ 183,912
Prepayment for purchase of materials 7,804,227 10,945
Value-added tax recoverable 14,565,106 5,864,989
Others 443,245 991,669
Total $ 22,997,609 $ 7,051,515