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Share-Based Compensation - Additional information (Details) ¥ / shares in Units, ¥ in Thousands | 12 Months Ended
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Dec. 31, 2024 CNY (¥) shares | Dec. 31, 2023 CNY (¥) ¥ / shares shares | Dec. 31, 2023 $ / shares | Dec. 31, 2022 ¥ / shares shares | Dec. 31, 2021 shares | Dec. 31, 2019 item shares
Number of option in grants |  | 281,250 |  | 800,000 |  |
Weighted Average exercise price of grants | ¥ / shares |  | ¥ 0.57 |  | ¥ 0.54 |  |
Common Stock, Shares, Issued | 3,624,773,740 |  |  |  |  |
Employee Stock Option |  |  |  |  |  |
Unrecognized Compensation cost | ¥ | ¥ 91,593 |  |  |  |  |
Weighted average period | 1 year 2 months 12 days |  |  |  |  |
Total intrinsic value of options exercised | ¥ | ¥ 6,190 | ¥ 112,499 |  |  |  |
Employee Stock Option | 2018 Plan |  |  |  |  |  |
Types of Award | item |  |  |  |  |  | 3
Maximum shares available for issuance |  |  |  |  |  | 62,504,000
Number of Additional shares reserved |  |  |  |  |  | 321,655,746
Increase in maximum shares available for issuance |  |  |  |  |  | 384,159,746
Number of option in grants | 0 | 281,250 |  |  |  |
Expiration period | 10 years |  |  |  |  |
Weighted Average exercise price of grants | (per share) |  | ¥ 0.57 | $ 0.08 |  |  |
Employee Stock Option | 2018 Plan | Maximum |  |  |  |  |  |
Share based compensation award vesting period | 4 years |  |  |  |  |
Employee Stock Option | 2018 Plan | Minimum |  |  |  |  |  |
Share based compensation award vesting period | 1 year |  |  |  |  |
Employee Stock Option | 2021 Plan |  |  |  |  |  |
Number of option in grants | 0 |  |  |  |  |
Expiration period |  |  |  |  | 10 years |
Common Stock, Shares, Issued |  |  |  |  | 80,508,501 |
Percentage of total number of shares issued and outstanding |  |  |  |  | 2.00% |
Restricted share units |  |  |  |  |  |
Total fair value of vested | ¥ | ¥ 26,798 | ¥ 31,872 |  |  |  |
Restricted share units | 2018 Plan |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | 22,140,000 | 69,910,980 |  | 112,336,970 |  |
Restricted share units | 2018 Plan | Maximum |  |  |  |  |  |
Share based compensation award vesting period | 4 years |  |  |  |  |
Restricted share units | 2018 Plan | Minimum |  |  |  |  |  |
Share based compensation award vesting period | 1 year |  |  |  |  |
Restricted share units | 2021 Plan |  |  |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period | 48,636,040 |  |  |  |  |
Restricted share units | 2021 Plan | Maximum |  |  |  |  |  |
Share based compensation award vesting period | 4 years |  |  |  |  |
Restricted share units | 2021 Plan | Minimum |  |  |  |  |  |
Share based compensation award vesting period | 1 year |  |  |  |  |

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- Definition Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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