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Share-Based Compensation (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Share Based Compensation Expense Recognized Related To Share Options Granted And Ordinary Shares | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year ended December 31,
​ | ​ | 2021 |  | 2022 |  | 2023
​ | ​ | RMB | ​ | RMB | ​ | RMB
Sales and marketing expenses | ​ | 10,853 |  | 16,120 |  | 35,352
General and administrative expenses | ​ | 190,252 |  | 80,448 |  | 85,335
Research and development expenses | ​ | 25,056 |  | 15,458 |  | 13,182
​ | ​ | 226,161 |  | 112,026 |  | 133,869
Summary of Company's Share Options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | Weighted |  | Weighted |  | ​
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | Average | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | remaining | ​ | Grant- | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | contractual | ​ | date Fair | ​ | Intrinsic
​ | ​ | Options | ​ | Price | ​ | life | ​ | Value | ​ | Value
​ |  | ​ |  | RMB |  | RMB |  | RMB |  | RMB
Outstanding as of December 31, 2021 | ​ | 247,008,342 |  | 0.29 |  | 7.94 |  | 2.10 |  | 543,248
Granted |  | 800,000 |  | 0.54 |  | — |  | 0.70 |  | —
Exercised |  | (27,750,770) |  | 0.39 |  | — |  | 1.20 |  | —
Forfeited |  | (30,645,015) |  | 0.31 |  | — |  | 3.52 |  | —
Outstanding as of December 31, 2022 |  | 189,412,557 |  | 0.28 |  | 6.95 |  | 2.14 |  | 452,543
Granted |  | 281,250 |  | 0.57 |  | — |  | 0.57 |  | —
Exercised |  | (72,294,940) |  | 0.14 |  | — |  | 1.52 |  | —
Forfeited |  | (11,127,905) |  | 0.46 |  | — |  | 4.11 |  | —
Outstanding as of December 31, 2023 |  | 106,270,962 |  | 0.36 |  | 6.19 |  | 2.56 |  | 276,835
Exercisable as of December 31, 2023 |  | 82,741,404 |  | 0.33 |  | 5.92 |  | 2.03 |  | 172,009
Summary of Estimated Fair Value of Share Options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Year Ended |  | Year Ended |
​ | ​ | December 31 | ​ | December 31 | ​
​ | ​ | 2022 | ​ | 2023 |
Risk free rate of interest |  | ​ | 2.79%‑2.85 | % | ​ | 2.55%‑2.94 | %
Volatility |  | ​ | 27 | % | ​ | 28 | %
Dividend yield |  | ​ | — |  | ​ | — | ​
Exercise multiples |  | ​ | 2.2 |  | ​ | 2.2 | ​
Life of options (years) |  | ​ | 10 |  | ​ | 10 | ​
Fair value of underlying ordinary shares | ​ | $ | 0.13~$0.31 | ​ | $ | 0.11~$0.29 | ​
Summary of the Restricted Share Units | ​
​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted Average
​ | ​ | ​ | ​ | Grant-date
​ | ​ | Number of RSUs | ​ | Fair Value
​ |  | ​ |  | RMB
As of December 31, 2021 |  | — |  | —
Granted |  | 112,336,970 |  | 0.83
Vested |  | (10,141,620) |  | 0.74
Forfeited or cancelled |  | (425,000) |  | 0.75
Unvested as of December 31, 2022 | ​ | 101,770,350 |  | 0.84
Granted | ​ | 69,910,980 | ​ | 1.41
Vested | ​ | (22,617,630) | ​ | 0.91
Forfeited or cancelled | ​ | (44,548,350) | ​ | 0.94
Unvested as of December 31, 2023 |  | 104,515,350 |  | 1.22
Summary of Non-vested Restricted Shares Activity | ​
​ | ​ | ​
​ |  | Number of shares
Outstanding as of December 31, 2020 | ​ | 12,554,722
Vested |  | 12,554,722
Outstanding as of December 31, 2021 |  | —
Share Option |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Summary of Company's Share Options | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | ​ |  | Weighted |  | Weighted |  |
​ | ​ | ​ | ​ | Weighted | ​ | Average | ​ | Average | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | remaining | ​ | Grant- | ​ | Aggregate
​ | ​ | Number of | ​ | Exercise | ​ | contractual | ​ | date Fair | ​ | Intrinsic
​ | ​ | Options | ​ | Price | ​ | life | ​ | Value | ​ | Value
​ | ​ | ​ |  | RMB |  | RMB |  | RMB |  | RMB
Outstanding as of the acquisition date |  | 450,246 |  | 15.90 |  | 7.68 |  | 24.81 |  | 7,162
Forfeited |  | (19,438) |  | 23.57 |  | — |  | 21.41 |  | —
Outstanding as of December 31, 2023 |  | 430,808 |  | 15.55 |  | 7.69 |  | 24.96 |  | 6,921
Exercisable as of December 31, 2023 |  | 187,200 |  | 16.28 |  | 7.16 |  | 21.12 |  | 2,165
Summary of Estimated Fair Value of Share Options | ​
​ | ​ | ​ | ​
​ |  | Year Ended December 31 |
​ | ​ | 2023 |
Risk free rate of interest |  | 2.64%-3.01 | %
Volatility |  | 29.8%-44.2 | %
Dividend yield |  | — | ​
Exercise multiples |  | 2.2-2.8 | ​
Life of options (years) |  | 10 | ​
Fair value of underlying ordinary shares |  | 13.37~36.29 | ​

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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