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Bank Loans (Tables)
12 Months Ended
Jun. 30, 2021
Debt Disclosure [Abstract]  
Schedule of outstanding balances of bank loans
    As of June 30,  
    2021     2020  
             
Loan from Bank of Shanghai Pudong Development   $ 4,425,504       -  
Loan from Bank of Communication     3,097,605     $ 1,132,327  
Loans from Development Bank of Singapore     23,374       60,681  
Loans from China Merchants Bank     -       990,785  
Total bank loans   $ 7,546,483     $ 2,183,793  
Less: Non-current portion     (9,644 )     (22,554 )
Short -term bank loans and long-term bank loans – current portion   $ 7,536,839     $ 2,161,239