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Other Assets (Tables)
12 Months Ended
Mar. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of other assets
   As of March 31, 
   2019   2018 
Prepayments for advertising or marketing
  $1,856,390   $- 
Prepayment of celebrity endorsement fee
   400,980    - 
Total  $2,257,370   $-