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Taxes Payable - Additional information (Details)
12 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
USD ($)
Mar. 31, 2021
Mar. 31, 2019
HKD ($)
Mar. 31, 2018
Taxes payable          
Statutory tax rate 25.00% 25.00% 25.00%    
Assessable profits $ 0 $ 0      
Withholding tax rate 10.00%        
Hongkong          
Taxes payable          
Statutory tax rate         16.50%
Hongkong | Assessable Profits up to HKD 2,000,000          
Taxes payable          
Statutory tax rate       8.25%  
Assessable profits       $ 2,000,000  
PRC          
Taxes payable          
Statutory tax rate 25.00% 25.00%      
Non-academic educational services          
Taxes payable          
VAT rate 3.00%        
Technical services          
Taxes payable          
VAT rate 6.00% 6.00%