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Other Non-Current Assets (Tables)
12 Months Ended
Jun. 30, 2021
Other Assets Noncurrent [Abstract]  
Schedule of estimated amortization expenses of lease advance payments
Years ending June 30,    
2022  $2,078,190 
2023  $2,078,190 
2024  $2,078,190 
2025  $2,078,190 
2026 and thereafter  $3,653,948