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Taxation - Additional Information (Detail)
¥ in Thousands, $ in Millions
12 Months Ended 60 Months Ended
Nov. 30, 2021
Jan. 01, 2008
Mar. 16, 2007
Dec. 31, 2024
HKD ($)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2022
Dec. 31, 2027
CNY (¥)
Dec. 31, 2024
CNY (¥)
Operating Loss Carryforwards [Line Items]                
Percentage of Value added tax rate       6.00%        
Effective Income Tax Rate Reconciliation, Percent       0.00% 4.10% 0.80%    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent       25.00% 25.00% 25.00%    
Income Tax Rate on Global Income       25.00%        
Uniform Tax Rate       25.00%        
Tax on Undistributed Dividends       10.00%        
Tax on Foreign Investor       5.00%        
Investor Owns Share       25.00%        
Deferred tax assets, valuation allowance         ¥ 521,462     ¥ 456,578
Consolidated Entity Variable Interest Entities VIE [Member]                
Operating Loss Carryforwards [Line Items]                
Operating Loss Carryforwards         ¥ 1,870,574     ¥ 1,905,882
HK                
Operating Loss Carryforwards [Line Items]                
Profit In Income Tax Regime | $       $ 2        
Effective Income Tax Rate Reconciliation, Percent       8.25%        
HK | Maximum [Member]                
Operating Loss Carryforwards [Line Items]                
Profit In Income Tax Regime | $       $ 2        
Effective Income Tax Rate Reconciliation, Percent       16.50%        
CN | Enterprise Income Tax Law [Member]                
Operating Loss Carryforwards [Line Items]                
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     25.00%          
Preferential Tax Rate 15.00% 15.00%            
PRC entities [Member]                
Operating Loss Carryforwards [Line Items]                
Effective Income Tax Rate Reconciliation, Percent             20.00%  
Income loss before tax subject to tax             25.00%  
Percentage of profit before tax subject to tax             ¥ 3,000