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Share-based Compensation - 2019 Incentive Plan (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2019 $ / shares shares | Sep. 30, 2019 CNY (¥) shares | Dec. 31, 2023 CNY (¥) $ / shares shares | Dec. 31, 2023 CNY (¥) ¥ / shares shares | Dec. 31, 2022 USD ($) $ / shares | Dec. 31, 2022 CNY (¥) ¥ / shares shares | Dec. 31, 2021 USD ($) $ / shares | Dec. 31, 2021 CNY (¥) ¥ / shares shares | Dec. 31, 2020 USD ($) $ / shares shares | Dec. 31, 2023 USD ($) shares | Jun. 30, 2021 shares
2019 Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares authorized under the plan (in shares) | 137,186,000 | 137,186,000 |  |  |  |  |  |  |  |  |
Incremental compensation cost | ¥ |  | ¥ 0 |  |  |  |  |  |  |  |  |
Number of replaced share options |  |  |  |  |  |  |  | 7,475,213 |  |  |
Assumptions |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  | 53.06% |  | 51.97% |  |  |  |  |
Contractual term (in year) |  |  |  | 10 years |  | 10 years |  | 10 years |  |  |
Risk-free interest rate |  |  |  | 3.77% |  | 3.57% |  |  |  |  |
Number of shares |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  |  |  | 94,028,978 |  | 94,830,430 |  | 88,240,084 |  |  |
Granted during the year |  |  |  | 875,004 |  | 3,167,881 |  | 32,765,413 |  |  |
Exercised during the year |  |  |  | 674,082 |  | 2,107,600 |  | 18,031,675 |  |  |
Forfeited / Cancelled during the year |  |  |  | (5,074,304) |  | (1,861,733) |  | (8,143,392) |  |  |
Ending balance |  |  |  | 89,155,596 |  | 94,028,978 |  | 94,830,430 | 88,240,084 |  |
Exercisable at the end |  |  | 76,201,677 | 76,201,677 |  |  |  |  |  | 76,201,677 |
Weighted average exercise price US$/Share |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of period | $ / shares |  |  | $ 0.0001 |  | $ 0.0001 |  | $ 0.0001 |  |  |  |
Granted during the year | $ / shares |  |  | 0.0001 |  | 0.0001 |  | 0.0001 |  |  |  |
Exercised during the year | $ / shares |  |  | 0.0001 |  | 0.0001 |  | 0.0001 |  |  |  |
Forfeited during the year | $ / shares |  |  | 0.0001 |  | 0.0001 |  | 0.0001 |  |  |  |
Outstanding at end of period | $ / shares | $ 0.0001 |  | $ 0.0001 |  | $ 0.0001 |  | $ 0.0001 |  | $ 0.0001 |  |
Aggregate intrinsic value |  |  |  |  |  |  |  |  |  |  |
Aggregate intrinsic value US$ | $ |  |  |  |  | $ 3,881,516 |  | $ 4,324,268 |  | $ 9,847,593 | $ 1,997,085 |
Weighted average remaining contractual years |  |  |  |  |  |  |  |  |  |  |
Weighted average remaining contractual years |  |  |  | 6 years 7 months 13 days |  | 7 years 6 months 10 days |  | 8 years 5 months 8 days | 8 years 9 months 7 days |  |
Unrecognized share-based compensation expenses, recognition period |  |  |  | 9 months 14 days |  |  |  |  |  |  |
Weighted average grant date fair value of share options | ¥ / shares |  |  |  | ¥ 0.27 |  | ¥ 0.26 |  | ¥ 0.54 |  |  |
Share-based compensation expenses recognized for share options | ¥ |  |  |  | ¥ 4,670 |  | ¥ 12,380 |  | ¥ 15,020 |  |  |
Unrecognized share-based compensation expenses | ¥ |  |  | $ 1,930 | ¥ 1,930 |  |  |  |  |  |  |
2019 Incentive Plan | Minimum |  |  |  |  |  |  |  |  |  |  |
Assumptions |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  | 49.29% |  |  |
Risk-free interest rate |  |  |  |  |  |  |  | 1.38% |  |  |
2019 Incentive Plan | Maximum |  |  |  |  |  |  |  |  |  |  |
Assumptions |  |  |  |  |  |  |  |  |  |  |
Expected volatility |  |  |  |  |  |  |  | 50.47% |  |  |
Risk-free interest rate |  |  |  |  |  |  |  | 1.45% |  |  |
2019 Incentive Plan | Class A ordinary shares |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares authorized under the plan (in shares) |  |  | 15,603,546 | 15,603,546 |  |  |  |  |  | 15,603,546 |
2014 and 2016 Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Number of shares |  |  |  |  |  |  |  |  |  |  |
Forfeited / Cancelled during the year |  | (91,548,120) |  |  |  |  |  |  |  |  |
Updated Incentive Plan 2019 |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Shares authorized under the plan (in shares) |  |  |  |  |  |  |  |  |  |  | 162,186,000
Employee options |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Vesting period (in years) |  |  |  | 4 years |  |  |  |  |  |  |
Expiration period (in years) |  |  |  | 10 years |  |  |  |  |  |  |
Replacement Share Options | 2019 Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of replaced share options |  |  |  | 0 |  | 0 |  |  |  |  |
Certain Directors And Senior Management | 2019 Incentive Plan |  |  |  |  |  |  |  |  |  |  |
Number of shares |  |  |  |  |  |  |  |  |  |  |
Granted during the year |  |  |  | 875,004 |  | 3,167,881 |  | 32,765,413 |  |  |

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