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ORDINARY SHARES PURCHASE WARRANTS ISSUED TO INVESTORS - Warrant activities (Details) - $ / shares
 6 Months Ended 12 Months Ended
Dec. 31, 2021
Jun. 30, 2021
Jun. 30, 2020
Class of Warrant or Right [Line Items]      
Weighted Average Exercise Price Outstanding Per Share $ 0.01    
Issued   $ 0.01  
Exercised   0.01  
Weighted Average Exercise Price Outstanding Per Share $ 0.01 $ 0.01  
Weighted average remaining period, outstanding 4 years 11 months 15 days 5 years 5 months 15 days  
Warrant [Member]      
Class of Warrant or Right [Line Items]      
Warrants Outstanding 8,814,102 2,591,112  
Issued   8,814,102  
Exercised   (2,591,112)  
Warrants Outstanding 8,814,102 8,814,102 2,591,112
Weighted Average Exercise Price Outstanding Per Share $ 6.24 $ 1.25  
Issued   6.24  
Exercised   1.25  
Weighted Average Exercise Price Outstanding Per Share $ 6.24 $ 6.24 $ 1.25
Weighted average remaining period, outstanding 4 years 11 months 15 days 5 years 5 months 15 days 5 years 6 months