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Issued Capital and Reserves - Additional Information (Details)
$ / shares in Units, $ in Thousands
4 Months Ended 12 Months Ended
Jan. 12, 2021
CNY (¥)
Jan. 12, 2021
USD ($)
$ / shares
shares
Mar. 04, 2020
CNY (¥)
shares
Dec. 31, 2021
CNY (¥)
shares
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2021
CNY (¥)
shares
Dec. 31, 2020
CNY (¥)
shares
Dec. 31, 2019
CNY (¥)
Dec. 31, 2021
$ / shares
Feb. 29, 2020
CNY (¥)
shares
Issued capital and reserves [Line Items]                    
Issued capital | ¥     ¥ 12,999,997,000 ¥ 194,000   ¥ 194,000 ¥ 162,000     ¥ 284,000,000,000
Percentage of equity interests acquired                   100.00%
Issuance costs | ¥     ¥ 557,000              
Minimum percentage of after tax profit to be kept as statutory reserve       10.00%   10.00%        
Percentage at which rights to discontinue allocations to statutory reserve       50.00%   50.00%        
Restricted amount included in statutory reserve fund | ¥       ¥ 9,420,000   ¥ 9,420,000 9,213,000      
Consideration Paid For Treasury Share | ¥       ¥ 1,274,000            
Par value per share | $ / shares                 $ 0.001  
Proceeds from issue of ordinary shares | ¥           ¥ 292,958,000 ¥ 90,406,000 ¥ 0    
Number of shares authorised       50,000,000   50,000,000        
Initial Public Offering [Member]                    
Issued capital and reserves [Line Items]                    
Issuance costs ¥ 36,282,000 $ 5,600                
Treasury shares [member]                    
Issued capital and reserves [Line Items]                    
Consideration Paid For Treasury Share | $         $ 199,000          
Repurchase Of Treasury Share       49,609 49,609          
Class A Ordinary Shares [Member]                    
Issued capital and reserves [Line Items]                    
Shares issued     1,499,423             4,856,273
Number of shares outstanding       21,285,625   21,285,625 16,285,625      
Number of shares authorised       41,718,902   41,718,902        
Voting rights entitled per share           one vote        
Class A Ordinary Shares [Member] | Initial Public Offering [Member]                    
Issued capital and reserves [Line Items]                    
Shares issued   5,000,000                
Par value per share | $ / shares   $ 10                
Proceeds from issue of ordinary shares ¥ 323,730,000 $ 50,000                
Class A Ordinary Shares [Member] | Treasury shares [member]                    
Issued capital and reserves [Line Items]                    
Number of shares outstanding       49,609   49,609      
Class B Ordinary Shares [Member]                    
Issued capital and reserves [Line Items]                    
Number of shares outstanding       8,281,098   8,281,098 8,281,098      
Number of shares authorised       8,281,098   8,281,098        
Voting rights entitled per share           ten votes