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Pre-Ipo Preferred Shares - Summarized Group of Preferred Shares Activities (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 CNY (¥) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CNY (¥) shares | Dec. 31, 2019 CNY (¥) shares
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 569,036,090 | 569,036,090
Beginning balance |  |  | ¥ 1,946,990 | ¥ 1,006,804
Temporary equity, accretion to redemption value, adjustment | ¥ 0 | $ 0 | ¥ 154,066 | ¥ 940,186
Temporary equity, shares outstanding ending balance | shares |  |  |  | 569,036,090
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (569,036,090) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (2,101,056) |
Ending balance |  |  |  | ¥ 1,946,990
Series A Convertible Redeemable Preferred Shares [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 100,000,000 | 100,000,000
Beginning balance |  |  | ¥ 344,876 | ¥ 164,733
Temporary equity, accretion to redemption value, adjustment |  |  | ¥ 29,021 | ¥ 180,143
Temporary equity, shares outstanding ending balance | shares |  |  |  | 100,000,000
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (100,000,000) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (373,897) |
Ending balance |  |  |  | ¥ 344,876
Series B Convertible Redeemable Preferred Shares [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 116,666,650 | 116,666,650
Beginning balance |  |  | ¥ 400,476 | ¥ 195,422
Temporary equity, accretion to redemption value, adjustment |  |  | ¥ 33,342 | ¥ 205,054
Temporary equity, shares outstanding ending balance | shares |  |  |  | 116,666,650
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (116,666,650) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (433,818) |
Ending balance |  |  |  | ¥ 400,476
Series C Convertible Redeemable Preferred Shares [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 142,583,330 | 142,583,330
Beginning balance |  |  | ¥ 485,302 | ¥ 249,150
Temporary equity, accretion to redemption value, adjustment |  |  | ¥ 38,707 | ¥ 236,152
Temporary equity, shares outstanding ending balance | shares |  |  |  | 142,583,330
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (142,583,330) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (524,009) |
Ending balance |  |  |  | ¥ 485,302
Series C1 Convertible Redeemable Preferred Shares [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 34,697,360 | 34,697,360
Beginning balance |  |  | ¥ 117,973 | ¥ 60,433
Temporary equity, accretion to redemption value, adjustment |  |  | ¥ 9,424 | ¥ 57,540
Temporary equity, shares outstanding ending balance | shares |  |  |  | 34,697,360
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (34,697,360) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (127,397) |
Ending balance |  |  |  | ¥ 117,973
Series C1 Plus Convertible Redeemable Preferred Shares [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 26,912,090 | 26,912,090
Beginning balance |  |  | ¥ 92,966 | ¥ 49,539
Temporary equity, accretion to redemption value, adjustment |  |  | ¥ 7,015 | ¥ 43,427
Temporary equity, shares outstanding ending balance | shares |  |  |  | 26,912,090
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (26,912,090) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (99,981) |
Ending balance |  |  |  | ¥ 92,966
Series D Convertible Redeemable Preferred Shares [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 128,152,790 | 128,152,790
Beginning balance |  |  | ¥ 438,439 | ¥ 250,098
Temporary equity, accretion to redemption value, adjustment |  |  | ¥ 31,610 | ¥ 188,341
Temporary equity, shares outstanding ending balance | shares |  |  |  | 128,152,790
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (128,152,790) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (470,049) |
Ending balance |  |  |  | ¥ 438,439
Series D1 Convertible Redeemable Preferred Shares [Member] |  |  |  |
Class of Stock [Line Items] |  |  |  |
Temporary equity, shares outstanding beginning balance | shares |  |  | 20,023,870 | 20,023,870
Beginning balance |  |  | ¥ 66,958 | ¥ 37,429
Temporary equity, accretion to redemption value, adjustment |  |  | ¥ 4,947 | ¥ 29,529
Temporary equity, shares outstanding ending balance | shares |  |  |  | 20,023,870
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, shares | shares |  |  | (20,023,870) |
Conversion of preferred shares to Class A ordinary shares upon the completion of the IPO, value |  |  | ¥ (71,905) |
Ending balance |  |  |  | ¥ 66,958

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