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Other Non-Current Assets (Tables)
12 Months Ended
Jun. 30, 2020
Other Assets Noncurrent Abstract  
Schedule of estimated amortization expenses of lease advance payments
Years ending June 30,    
2021  $1,899,638 
2022  $1,899,638 
2023  $1,899,638 
2024  $1,899,638 
2025 and thereafter  $5,244,962