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RESTRICTED NET ASSETS (Details) - USD ($)
$ in Millions
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
RESTRICTED NET ASSETS    
Restricted net assets $ 47.1 $ 104.3
Required percentage of net income allocated to statutory surplus reserve 10.00%  
Threshold percentage of statutory surplus reserves of the registered capital, used as criteria of allocation requirement 50.00%  
Statutory reserve $ 9.0 $ 9.0