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TAXATION - Tax recoverable and payable (Details) - USD ($)
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Current assets      
Income tax $ 1,647,398 $ 990,881 $ 112,220
Non-current assets      
Income tax 42,513 10,105 2,653
Minimum presumed income tax 1,899 2,484 3,376
Total 44,412 12,589 6,029
Liabilities      
Income tax $ 7,538,764 $ 7,452,891 $ 1,556,715