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Basic And Diluted Net Loss Per Share - Summary Of Basic And Diluted Loss Per Share (Detail) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021 CNY (¥) ¥ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 CNY (¥) ¥ / shares shares	Dec. 31, 2019 CNY (¥) ¥ / shares shares
Numerator
Net loss	¥ (1,071,074)	$ (168,074)	¥ (941,895)	¥ (502,055)
Accretion on convertible redeemable preferred shares to redemption value	(164,065)	(25,745)	(283,981)	(232,319)
Net loss attributable to ordinary shareholders	¥ (1,235,139)	$ (193,819)	¥ (1,225,876)	¥ (734,374)
Weighted average number of ordinary shares used in computing net loss per share
Basic and diluted	529,343,027	529,343,027	111,172,986	107,114,306
Net loss per share attributable to ordinary shareholders
Basic and diluted | (per share)	¥ (2.33)	$ (0.37)	¥ (11.03)	¥ (6.86)

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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