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Income Taxes - Additional Information (Details) - CNY (¥)
9 Months Ended 12 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Income Taxes [Line Items]      
Effective tax rates 5.31% 2.74%  
PRC Subsidiaries      
Income Taxes [Line Items]      
Statutory income tax rate 25.00% 25.00%  
Hong Kong      
Income Taxes [Line Items]      
Withholding taxes ¥ 0    
Statutory income tax rate 16.50%    
Singapore      
Income Taxes [Line Items]      
Withholding taxes ¥ 0    
Statutory income tax rate 17.00%    
China      
Income Taxes [Line Items]      
Statutory income tax rate 25.00%    
China | PRC Subsidiaries      
Income Taxes [Line Items]      
Tax years remain open to examination by respective taxing jurisdictions 2019 2020 2021 2022 2023    
Uncertain tax positions, interest and penalties ¥ 0   ¥ 0
China | PRC Subsidiaries | Maximum      
Income Taxes [Line Items]      
Time period that tax authorities could conduct examinations of entity's tax filings 5 years