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Share-Based Compensation - Summary of Restricted Share Units (Details) - 12 months ended Dec. 31, 2021 - Restricted Share Units - Employees and Directors
¥ / shares in Units, ¥ in Thousands
CNY (¥)
¥ / shares
shares
$ / shares
CNY (¥)
¥ / shares
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Number of Share Units, Outstanding, December 31, 2020 | shares 95,094    
Number of Share Units, Granted | shares 119,568    
Number of Share Units, Exercised | shares 95,096    
Number of Share Units, Outstanding, December 31, 2021 | shares 119,566    
Number of Share Units, Vested and expected to vest at December 31, 2021 | shares     119,566
Weighted-Average grant-date Fair Value per Option, Outstanding, December 31, 2020 | ¥ / shares ¥ 20.37    
Weighted-Average grant-date Fair Value per Option, Granted | ¥ / shares 13.92    
Weighted-Average grant-date Fair Value per Option, Exercised | ¥ / shares 19.09    
Weighted-Average grant-date Fair Value per Option, Outstanding, December 31, 2021 | ¥ / shares ¥ 14.94    
Weighted-Average grant-date Fair Value per Option, Vested and expected to vest at December 31, 2021 | ¥ / shares     ¥ 14.94
Weighted-Average grant-date Fair Value per Option, Exercisable at December 31, 2020 | $ / shares   $ 10.66  
Weighted Average Remaining Contractual Term (Years), Outstanding 9 months 26 days    
Weighted Average Remaining Contractual Term (Years), Vested and expected to vest at December 31, 2021 9 months 26 days    
Aggregate Intrinsic Value, Outstanding, December 31, 2020 | ¥ ¥ 3,751    
Aggregate Intrinsic Value, Granted | ¥ 0    
Aggregate Intrinsic Value, Outstanding, December 31, 2021 | ¥ ¥ 1,189    
Aggregate Intrinsic Value, Vested and expected to vest at December 31, 2021 | ¥     ¥ 1,189