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Subsequent Events - Additional Information (Details)
¥ in Thousands, $ in Thousands
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Sep. 30, 2024
CNY (¥)
Sep. 30, 2024
USD ($)
Sep. 30, 2023
CNY (¥)
Dec. 30, 2022
Subsequent Event [Line Items]            
Long-term restricted cash [1]     ¥ 550,524 $ 78,449 ¥ 1,894,878  
PAG Notes            
Subsequent Event [Line Items]            
Interest rate           6.00%
PAG Notes | Subsequent Event            
Subsequent Event [Line Items]            
Debt instrument remaining amount drew down   $ 122,500        
Long-term restricted cash ¥ 54,532 $ 7,771        
Interest rate 6.00% 6.00%        
[1] Long-term restricted cash included in “Prepayments and other assets” on the condensed consolidated balance sheets mainly represents collateral to repayments of PAG Notes (Note 8).