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Income Taxes - Additional information (Details)
12 Months Ended
Dec. 31, 2024
CNY (¥)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
Dec. 31, 2024
USD ($)
Income Taxes          
Statutory income tax rate 25.00% 25.00% 25.00% 25.00%  
Unrecognized tax benefits ¥ 0   ¥ 0   $ 0
Operating loss carryforwards 2,836,000,000   3,142,000,000   389,000,000
Unrecognized tax benefits that would impact effective tax rate 0       0
Presented on a Net Basis Against the Deferred Tax Assets Related to Tax Loss Carry Forwards [Member]          
Income Taxes          
Unrecognized tax benefits 0   ¥ 0   $ 0
Maximum          
Income Taxes          
Undistributed earnings from foreign subsidiaries ¥ 10,478,000,000 $ 1,435,000,000      
PRC tax authority to conduct examinations, term 5 years 5 years      
Domestic Tax Authority [Member] | Maximum          
Income Taxes          
Operating loss carryforwards, Expiration year 2029 2029      
Domestic Tax Authority [Member] | Minimum          
Income Taxes          
Operating loss carryforwards, Expiration year 2025 2025      
Hong Kong          
Income Taxes          
Statutory income tax rate 16.50% 16.50%      
PRC          
Income Taxes          
Statutory income tax rate 25.00% 25.00%      
Withholding tax rate 10.00% 10.00%      
AUSTRALIA          
Income Taxes          
Statutory income tax rate 30.00% 30.00%