Share-based Compensation (Tables)
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12 Months Ended |
Dec. 31, 2024 |
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| Share-based Compensation Arrangement by Share-based Payment Award |
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| Summary of compensation expenses recognized for share-based awards |
| | | | | | | | | For the Year Ended December 31, | | | 2022 | | 2023 | | 2024 | Research and development expenses | | 1,333,710 | | 1,552,421 | | 1,257,921 | Selling, general and administrative expenses | | 674,610 | | 779,637 | | 1,333,256 | Cost of sales | | 44,845 | | 46,631 | | 39,728 | Total | | 2,053,165 | | 2,378,689 | | 2,630,905 |
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| 2019 and 2020 Share Incentive Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award |
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| Summary of stock option activities |
| | | | | | | | | | | | | | | Weighted | | | | | | | Weighted | | Average | | Aggregate | | | Number of | | Average | | Remaining | | Intrinsic | | | Options | | Exercise Price | | Contractual Life | | Value | | | | | US$ | | In Years | | US$ | Outstanding as of December 31, 2021 | | 83,391,284 | | 0.10 | | 6.70 | | 1,330,091 | Granted | | 579,600 | | 0.10 | | | | | Exercised | | (5,801,840) | | 0.10 | | | | | Forfeited | | (3,832,800) | | 0.10 | | | | | Outstanding as of December 31, 2022 | | 74,336,244 | | 0.10 | | 5.56 | | 750,796 | Granted | | — | | — | | | | | Exercised | | (10,519,982) | | 0.10 | | | | | Forfeited | | (3,508,800) | | 0.10 | | | | | Outstanding as of December 31, 2023 | | 60,307,462 | | 0.10 | | 4.41 | | 1,122,594 | Granted | | — | | — | | | | | Exercised | | (8,109,300) | | 0.10 | | | | | Forfeited | | (2,078,800) | | 0.10 | | | | | Outstanding as of December 31, 2024 | | 50,119,362 | | 0.10 | | 4.81 | | 596,170 | | | | | | | | | | Vested and expected to vest as of December 31, 2023 | | 58,836,673 | | 0.10 | | 4.34 | | 1,095,245 | Exercisable as of December 31, 2023 | | 43,618,062 | | 0.10 | | 3.35 | | 811,950 | Vested and expected to vest as of December 31, 2024 | | 49,345,755 | | 0.10 | | 4.79 | | 586,968 | Exercisable as of December 31, 2024 | | 41,387,162 | | 0.10 | | 4.51 | | 492,300 |
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| Summary of options fair value assumptions |
| | | | | For the Year Ended December 31, | | | 2022 | Exercise price (US$) | | 0.10 | Fair value of the ordinary shares on the grant date (US$) | | 16.05 | Risk‑free interest rate | | 1.51% | Expected term (in years) | | 10.00 | Expected dividend yield | | 0% | Expected volatility | | 48% |
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| Summary of RSU activity |
| | | | | | | | | | | Weighted Average | | Weighted Average | | | Number of | | Grant Date | | Remaining | | | Shares | | Fair Value | | Contractual Life | | | | | US$ | | In Years | Unvested as of December 31, 2021 | | 8,586 | | 17.25 | | 9.50 | Granted | | 36,199,400 | | 17.13 | | | Vested | | (127,062) | | 18.76 | | | Forfeited | | (5,087,800) | | 16.74 | | | Unvested as of December 31, 2022 | | 30,993,124 | | 17.20 | | 9.21 | Granted | | 46,992,750 | | 15.53 | | | Vested | | (12,646,762) | | 15.56 | | | Forfeited | | (3,584,600) | | 15.79 | | | Unvested as of December 31, 2023 | | 61,754,512 | | 16.34 | | 9.14 | Granted | | 6,542,020 | | 10.33 | | | Vested | | (13,934,292) | | 16.08 | | | Forfeited | | (11,285,050) | | 16.31 | | | Unvested as of December 31, 2024 | | 43,077,190 | | 15.37 | | 8.39 |
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| 2021 Share Incentive Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award |
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| Summary of stock option activities |
| | | | | | | | | | | Weighted | | Weighted Average | | | Number of | | Average Exercise | | Remaining | | | Shares | | Price | | Contractual Life | | | | | US$ | | In Years | December 31, 2021 | | 108,557,400 | | 14.63 | | 9.19 | Granted | | — | | — | | — | December 31, 2022 | | 108,557,400 | | 14.63 | | 8.19 | Granted | | — | | — | | — | December 31, 2023 | | 108,557,400 | | 14.63 | | 7.19 | Granted | | — | | — | | — | December 31, 2024 | | 108,557,400 | | 14.63 | | 6.19 |
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