Share-Based Compensation - Summary of Share Based Compensation Restricted Stock Units (Details) - Restricted share units - ¥ / shares	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
2018 Plan
Share-Based Compensation
Beginning balance	104,515,350	101,770,350	0
Granted	22,140,000	69,910,980	112,336,970
Vested	(30,681,250)	(22,617,630)	(10,141,620)
Forfeited or cancelled	(23,152,890)	(44,548,350)	(425,000)
Ending balance	72,821,210	104,515,350	101,770,350
Weighted Average Grant-date Fair Value, Beginning balance	¥ 1.22	¥ 0.84	¥ 0
Weighted Average Grant-date Fair Value, Granted	0.78	1.41	0.83
Weighted Average Grant-date Fair Value, Vested	1.14	0.91	0.74
Weighted Average Grant-date Fair Value, Forfeited or cancelled	1.44	0.94	0.75
Weighted Average Grant-date Fair Value, Ending balance	¥ 1.08	¥ 1.22	¥ 0.84
2021 Plan
Share-Based Compensation
Granted	48,636,040
Forfeited or cancelled	(2,000,000)
Ending balance	46,636,040
Weighted Average Grant-date Fair Value, Granted	¥ 0.83
Weighted Average Grant-date Fair Value, Forfeited or cancelled	0.84
Weighted Average Grant-date Fair Value, Ending balance	¥ 0.83

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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).

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The weighted average fair value at grant date for nonvested equity-based awards issued 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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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