Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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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.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Aggregate amount of redemption requirements for each class or type of redeemable stock classified as temporary equity for each of the five years following the latest balance sheet date. The redemption requirement does not constitute an unconditional obligation that will be settled in a variable number of shares constituting a monetary value predominantly indexed to (a) a fixed monetary amount known at inception, (b) an amount inversely correlated with the residual value of the entity, or (c) an amount determined by reference to something other than the fair value of issuer's stock. Does not include mandatorily redeemable stock. The exception is if redemption is required upon liquidation or termination of the reporting entity.

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The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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Per share amount of par value or stated value of stock classified as temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable.

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The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer.

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CONSOLIDATED BALANCE SHEETS (Parenthetical)	Dec. 31, 2021 $ / shares	Dec. 31, 2021 CNY (¥) shares	Dec. 31, 2020 $ / shares	Dec. 31, 2020 CNY (¥) shares	Dec. 31, 2019 $ / shares	Dec. 31, 2019 CNY (¥) shares
Series A Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Shares, par value \| $ / shares	$ 0.0001		$ 0.0001		$ 0.0001
Redeemable Convertible Preferred, shares authorized		0		18,642,038		18,642,038
Redeemable Convertible Preferred Shares, shares issued		0		18,642,038		18,642,038
Redeemable Convertible Preferred Shares, shares outstanding		0		18,642,038		18,642,038
Redeemable Convertible Preferred Shares, Redemption value \| ¥		¥ 0		¥ 380,664,000		¥ 174,528,000
Redeemable Convertible Preferred Shares, Liquidation value \| ¥		¥ 0		¥ 29,420,000		¥ 29,119,000
Series B Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Shares, par value \| $ / shares	0.0001		0.0001		0.0001
Redeemable Convertible Preferred, shares authorized		0		19,617,225		19,617,225
Redeemable Convertible Preferred Shares, shares issued		0		19,617,225		19,617,225
Redeemable Convertible Preferred Shares, shares outstanding		0		19,617,225		19,617,225
Redeemable Convertible Preferred Shares, Redemption value \| ¥		¥ 0		¥ 404,394,000		¥ 202,954,000
Redeemable Convertible Preferred Shares, Liquidation value \| ¥		¥ 0		¥ 104,748,000		¥ 103,675,000
Series C Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Shares, par value \| $ / shares	0.0001		0.0001		0.0001
Redeemable Convertible Preferred, shares authorized		0		44,659,956		44,659,956
Redeemable Convertible Preferred Shares, shares issued		0		44,659,956		44,659,956
Redeemable Convertible Preferred Shares, shares outstanding		0		44,659,956		44,659,956
Redeemable Convertible Preferred Shares, Redemption value \| ¥		¥ 0		¥ 943,228,000		¥ 607,847,000
Redeemable Convertible Preferred Shares, Liquidation value \| ¥		¥ 0		¥ 556,268,000		¥ 550,571,000
Series D Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Shares, par value \| $ / shares	0.0001		0.0001		0.0001
Redeemable Convertible Preferred, shares authorized		12,462,157		12,462,157		12,462,157
Redeemable Convertible Preferred Shares, shares issued		12,462,157		12,462,157		12,462,157
Redeemable Convertible Preferred Shares, shares outstanding		0		0		0
Redeemable Convertible Preferred Shares, Redemption value \| ¥		¥ 0		¥ 268,573,000		¥ 208,826,000
Redeemable Convertible Preferred Shares, Liquidation value \| ¥		¥ 0		¥ 207,905,000		¥ 205,776,000
Series E Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Shares, par value \| $ / shares	0.0001		0.0001		0.0001
Redeemable Convertible Preferred, shares authorized		0		20,137,444		13,040,152
Redeemable Convertible Preferred Shares, shares issued		0		20,137,444		13,040,152
Redeemable Convertible Preferred Shares, shares outstanding		0		20,137,444		13,040,152
Redeemable Convertible Preferred Shares, Redemption value \| ¥		¥ 0		¥ 437,249,000		¥ 229,974,000
Redeemable Convertible Preferred Shares, Liquidation value \| ¥		¥ 0		¥ 330,573,000		¥ 229,104,000
Series F Redeemable Convertible Preferred Shares
Redeemable Convertible Preferred Shares, par value \| $ / shares	0.0001		0.0001		0.0001
Redeemable Convertible Preferred, shares authorized		0		43,381,194		0
Redeemable Convertible Preferred Shares, shares issued		0		31,581,509		0
Redeemable Convertible Preferred Shares, shares outstanding		0		31,581,509		0
Redeemable Convertible Preferred Shares, Redemption value \| ¥		¥ 0		¥ 691,472,000		¥ 0
Redeemable Convertible Preferred Shares, Liquidation value \| ¥		¥ 0		¥ 599,932,000		¥ 0
Pre-offering Class A ordinary shares
Ordinary Shares, par value \| $ / shares	0.0001		0.0001		0.0001
Ordinary Shares, shares authorized		0		126,242,010		214,973,841
Ordinary Shares shares issued		0		41,932,446		34,724,614
Ordinary Shares, shares outstanding		0		34,795,851		24,869,721
Pre-offering Class B ordinary shares
Ordinary Shares, par value \| $ / shares	0.0001		$ 0.0001		$ 0.0001
Ordinary Shares, shares authorized		0		214,857,976		170,492,060
Ordinary Shares shares issued		0		55,957,962		55,957,962
Ordinary Shares, shares outstanding		0		55,957,962		55,957,962
Class A Ordinary Shares
Ordinary Shares, par value \| $ / shares	0.0001
Ordinary Shares, shares authorized		600,000,000
Ordinary Shares shares issued		309,105,485
Ordinary Shares, shares outstanding		301,287,039
Class B Ordinary Shares
Ordinary Shares, par value \| $ / shares	$ 0.0001
Ordinary Shares, shares authorized		25,649,839
Ordinary Shares shares issued		25,649,839
Ordinary Shares, shares outstanding		25,649,839