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Summary of significant accounting policies (Tables)
9 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]  
Schedule of exchange rates
          
   December 31, 2022      December 31, 2021  
Period-end spot rate   EUR 1 = US$1.0698    EUR 1 = US$1.1318 
Average rate for nine months period   EUR 1 = US$1.0310    EUR 1 = US$1.1762 
Schedule of estimated annual deprecation rate
        
         
Category  Depreciation rate   Estimated residual value 
Office equipment  3 years    Nil 
Leasehold improvements  Shorter of lease term or 3 years    Nil