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Share-based Compensation - Assumptions (Details) - $ / shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Share-based Compensation      
Exercise price (US Dollar)   $ 0.2  
Risk-free interest rate, minimum   1.92% 1.13%
Risk-free interest rate, maximum   3.22% 1.79%
Expected term (in years) 0 years 10 years 10 years
Expected volatility, minimum   55.68% 50.40%
Expected volatility, maximum   55.78% 55.79%
Minimum      
Share-based Compensation      
Exercise price (US Dollar)     $ 0.2
Exercise multiple   $ 2.2 $ 2.2
Expected forfeiture rate (post-vesting)   5.83% 2.96%
Fair value of the underlying shares on the date of options grants (US Dollar)   $ 2.24 $ 6.25
Fair value of share option (US Dollar)   2.05 5.78
Maximum      
Share-based Compensation      
Exercise price (US Dollar)     2.88
Exercise multiple   $ 2.8 $ 2.8
Expected forfeiture rate (post-vesting)   7.70% 5.83%
Fair value of the underlying shares on the date of options grants (US Dollar)   $ 5.46 $ 20.91
Fair value of share option (US Dollar)   $ 5.27 $ 20.91