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Summary of Significant Accounting Policies (Details 2)
12 Months Ended
Jun. 30, 2019
Plant and machinery [Member]  
Useful life 10 years
Office equipment [Member]  
Useful life 5 years
Maximum [Member] | Transportation equipment [Member]  
Useful life 10 years
Maximum [Member] | Buildings and improvements [Member]  
Useful life 20 years
Minimum [Member] | Transportation equipment [Member]  
Useful life 7 years
Minimum [Member] | Buildings and improvements [Member]  
Useful life 3 years