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Accounts Receivable, Net (Tables)
 12 Months Ended
Mar. 31, 2021
Receivables [Abstract]  
Schedule of accounts receivable, net
   As of March 31, 
   2020   2021 
   $   $ 
Accounts receivable   2,008    973 
Less: expected credit loss provision   -    - 
    2,008    973 
Schedule of movements of the expected credit loss provision
   Year ended March 31, 
   2019   2020   2021 
   $   $   $ 
At beginning of year   -    -    - 
Provision for the year   -    -    - 
At end of year   -    -    -