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Equity Method Investment (Tables)
12 Months Ended
Mar. 31, 2023
Equity Method Investments and Joint Ventures [Abstract]  
Schedule of equity method investments
   Year ended March 31, 
   2022   2023 
   RMB   RMB 
         
Cost   1,425    1,425 
Less: accumulated impairment   (1,425)   (1,425)
Equity method investment, net   
-
    
-