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Investments in Equity Method Investees (Tables)
12 Months Ended
Mar. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of investments in equity investee

   As of March 31, 
   2018   2019 
   $   $ 
The Group's proportionate share of equity in  the net assets of equity investees   5    5 
Less: Accumulated impairment losses recognized   (5)   (5)
           
Investments in equity investees reported in the consolidated balance sheets   -    -