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Income Taxes (Details 1) - USD ($)
Jun. 30, 2019
Jun. 30, 2018
Deferred tax assets    
Allowance for doubtful accounts $ 3,248,050 $ 2,972,087
Accrued claims charges 1,139,526 611,363
Impairment loss of long-lived assets 393,673 393,673
Net operating loss carryforward in China 477,887 145,641
Net operating loss carryforward in the U.S. 39,662 62,852
Valuation allowance (5,298,798) (4,185,616)
Total net deferred tax assets