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Cash and cash equivalents (Tables)
 12 Months Ended
Mar. 31, 2023
Schedule of cash and cash equivalents

   2022   2023 
   March 31, 
   2022   2023 
Cash on hand   255    125 
Credit card collection in hand   167,837    207,235 
Balances with bank   632,190    296,241 
Total   800,282    503,601