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Share-Based Compensation - Additional information (Details)
¥ in Thousands, $ in Thousands
12 Months Ended
Apr. 28, 2020
CNY (¥)
Dec. 21, 2018
shares
Dec. 31, 2022
CNY (¥)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
CNY (¥)
Dec. 31, 2020
CNY (¥)
Share-Based Compensation            
Share-based compensation expense     ¥ 16,724 $ 2,425 ¥ 47,067 ¥ 102,750
Total unrecognized compensation expense     115      
Share-based compensation expenses     ¥ 16,724 $ 2,425 ¥ 47,067 ¥ 102,750
Total unrecognized compensation expense, weighted average recognition period     1 year 1 year    
Stock options            
Share-Based Compensation            
Grantees agreed not to exercise any stock option (in months) 12 months          
Impact on total compensation cost from incremental fair value ¥ 0          
2018 Plan | Stock options            
Share-Based Compensation            
Maximum aggregate number of shares that may be issued | shares   260,454,163        
2018 Plan | Vesting first year | Stock options            
Share-Based Compensation            
Percentage of Vesting rights   30.00%        
Vesting Period   12 months        
2018 Plan | Vesting second year | Stock options            
Share-Based Compensation            
Percentage of Vesting rights   30.00%        
Vesting Period   2 years        
2018 Plan | Vesting third year | Stock options            
Share-Based Compensation            
Percentage of Vesting rights   40.00%        
Vesting Period   36 months