The number of replaced share options which were earlier issued under different plans as restricted share units.

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Amount of increase to additional paid-in capital (APIC) for recognition of cost for option under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of cost to be recognized for option under share-based payment arrangement.

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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.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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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Number of shares authorized for issuance under share-based payment arrangement.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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An excess of the fair value of the modified award over the fair value of the award immediately before the modification.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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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.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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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 CNY (¥) shares	Sep. 30, 2019 $ / shares shares	Dec. 31, 2021 CNY (¥) ¥ / shares shares	Dec. 31, 2021 CNY (¥) $ / shares shares	Dec. 31, 2020 CNY (¥) shares	Dec. 31, 2020 USD ($) $ / shares	Dec. 31, 2019 CNY (¥) ¥ / shares shares	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares 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
Assumptions
Expected volatility					50.22%		50.22%
Contractual term (in year)			10 years		10 years		10 years
Risk-free interest rate					1.66%		1.66%
Number of shares
Beginning balance			88,240,084		126,402,925
Granted during the year			32,765,413		5,125,000		129,590,471
Exercised during the year			(18,031,675)		(36,613,500)		0
Forfeited / Cancelled during the year			(8,143,392)		(6,674,341)		(3,187,546)
Ending balance			94,830,430		88,240,084		126,402,925
Exercisable at the end			56,003,331	56,003,331					56,003,331
Weighted average exercise price US$/Share
Outstanding at beginning of period \| $ / shares				$ 0.0001		$ 0.0001
Granted during the year \| $ / shares				0.0001		0.0001		$ 0.0001
Exercised during the year \| $ / shares				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
Exercisable at the end (in dollars per share) \| $ / shares									$ 0.0001
Aggregate intrinsic value
Aggregate intrinsic value US$ \| $						$ 9,847,593		$ 37,352,064	$ 4,324,268
Weighted average remaining contractual years
Weighted average remaining contractual years			8 years 5 months 8 days		8 years 9 months 7 days		9 years 8 months 4 days
Weighted average price of options granted during the year \| $ / shares				$ 0.0001		$ 0.0001		$ 0.0001
Weighted average exercise price of options exercisable \| $ / shares									$ 0.0001
Unrecognized share-based compensation expenses, recognition period			1 year 7 days
Weighted average grant date fair value of share options \| (per share)			¥ 0.54			$ 0.78	¥ 3.81
Share-based compensation expenses recognized for share options \| ¥			¥ 15,020		¥ 39,280		¥ 61,250
Unrecognized share-based compensation expenses \| ¥			¥ 24,170	$ 24,170
Unrecognized compensation expense, recognition period			1 year 7 days
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)			12,710,395	12,710,395					12,710,395
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			7,475,213		24,474,535
Certain Directors And Senior Management \| 2019 Incentive Plan
Number of shares
Granted during the year			32,765,413		5,125,000		129,590,471