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Accounts and Notes Receivable, Net (Details 1) - USD ($)
6 Months Ended 12 Months Ended
Dec. 31, 2019
Jun. 30, 2019
Receivables [Abstract]    
Beginning balance $ 21,191,849 $ 19,291,772
provision for doubtful accounts 3,159,302 2,601,781
Less: write-off
Exchange rate effect (262,596) (701,704)
Ending balance $ 24,088,555 $ 21,191,849