v3.26.1
Principal Accounting Policies (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Mar. 31, 2026
CNY (¥)
segment
Mar. 31, 2026
USD ($)
segment
Mar. 31, 2025
CNY (¥)
Mar. 31, 2024
CNY (¥)
Apr. 01, 2025
CNY (¥)
Mar. 31, 2025
USD ($)
Apr. 01, 2024
CNY (¥)
Mar. 31, 2024
USD ($)
Apr. 01, 2023
CNY (¥)
Principal Accounting Policies [Line Items]                  
Cumulative-effect to retained earnings                 ¥ 2,800
CECL allowance at a reversal ¥ 100   ¥ 2,000            
Contract asset (in Dollars) | $              
Total contract liabilities         ¥ 1,800   ¥ 1,600    
Recognized revenue 1,000   3,700            
Unearned revenue ¥ 1,900                
Right of return term 7 days 7 days              
Cost of revenue ¥ 310,028 $ 44,945 368,240 ¥ 568,615          
Advertising expenses 47,000   31,000 26,000          
Research and development expenses ¥ 200   1,500 2,200          
Government Assistance Statement of Income or Comprehensive Income Extensible Enumeration Not Disclosed Flag government government              
Government subsidies ¥ 300   400 3,000          
Unrecognized uncertain tax positions              
Description of CODM The Company’s chief operating decision maker (“CODM”) is the Chief Executive Officer. The CODM reviews the consolidated net loss that is reported on the consolidated statements of comprehensive loss to assess performance and make decisions about allocating resources for the Company’s single reportable segment. The Company’s chief operating decision maker (“CODM”) is the Chief Executive Officer. The CODM reviews the consolidated net loss that is reported on the consolidated statements of comprehensive loss to assess performance and make decisions about allocating resources for the Company’s single reportable segment.              
Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration] Chief Executive Officer Chief Executive Officer              
Number of reportable segment (in segment) | segment 1 1              
US [Member]                  
Principal Accounting Policies [Line Items]                  
Foreign currency exchange rate published by people’s bank of china 1   1     1      
Convenience translation exchange rate published by the federal reserve board 1                
RMB [Member]                  
Principal Accounting Policies [Line Items]                  
Foreign currency exchange rate published by people’s bank of china 6.9194   7.1782     7.1782      
Convenience translation exchange rate published by the federal reserve board 6.898                
Minimum [Member]                  
Principal Accounting Policies [Line Items]                  
Credit terms granted 30 days 30 days              
Maximum [Member]                  
Principal Accounting Policies [Line Items]                  
Credit terms granted 360 days 360 days              
Cost of Product Sales [Member]                  
Principal Accounting Policies [Line Items]                  
Cost of revenue ¥ 299,600   ¥ 360,100 560,100          
Cost of Services [Member]                  
Principal Accounting Policies [Line Items]                  
Cost of revenue ¥ 10,500   ¥ 8,200 ¥ 8,500