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Summary of Significant Accounting Policies (Tables)
3 Months Ended
Oct. 31, 2022
Accounting Policies [Abstract]  
Schedule of currency exchange rates
   October 31, 2021 
Foreign currency  Period-end
spot rate
   Average rate 
RMB: 1USD   0.1561    0.1550 
HKD: 1USD   0.1282    0.1282