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Summary of Significant Accounting Policies - Additional Information (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2023 CNY (¥) segment $ / ¥ | Dec. 31, 2023 USD ($) segment | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2023 USD ($) $ / ¥ | Dec. 31, 2020 CNY (¥)
Management fee, percent of the VIE's total consolidated profit | 100.00% |  |  |  | 100.00% |
Foreign currency translation rate | $ / ¥ | 7.0999 |  |  |  | 7.0999 |
Restricted cash | ¥ 561,798 |  | ¥ 507,164 |  |  |
Intangible asset estimated useful life | 10 years |  |  |  | 10 years |
Impairment of intangible assets | ¥ 0 |  | ¥ 0 | ¥ 717 |  |
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration] | Operating Expenses | Operating Expenses | Operating Expenses | Operating Expenses |  |
Impairment loss of goodwill | ¥ 0 |  | ¥ 0 | ¥ 0 |  |
Impairment on equity securities without readily determinable fair value | ¥ 2,060 |  | 0 | 784 |  |
Term of short-term health insurance policies | 12 months | 12 months |  |  |  |
VAT | ¥ 187,863 |  | 257,154 | 309,891 |  |
Cash and cash equivalents and restricted cash | ¥ 823,717 |  | ¥ 1,492,694 |  |  |
Percentage of currency risk | 84.57% |  | 71.37% |  | 84.57% |
Shareholders Equity | ¥ 4,585,694 |  | ¥ 4,766,128 | 3,973,426 | $ 645,881 | ¥ (1,657,024)
Net loss attributable to mezzanine equity classified as non-controlling interests shareholders | ¥ (3,536) | $ (498) | 0 | 0 |  |
Number of operating segments | segment | 3 | 3 |  |  |  |
Minimum |  |  |  |  |  |
Term of long-term health insurance policies | 6 years | 6 years |  |  |  |
Percentage of value added taxes | 3.00% |  |  |  | 3.00% |
Maximum |  |  |  |  |  |
Term of long-term health insurance policies | 30 years | 30 years |  |  |  |
Percentage of value added taxes | 6.00% |  |  |  | 6.00% |
Accumulated deficit [Member] |  |  |  |  |  |
Shareholders Equity | ¥ (2,561,963) |  | (2,726,919) | ¥ (3,334,636) |  | ¥ (1,672,021)
Cumulative effect of change in accounting principle |  |  |  |  |  |
Shareholders Equity | (2,265) |  |  |  |  |
Cumulative effect of change in accounting principle | Accumulated deficit [Member] |  |  |  |  |  |
Shareholders Equity | ¥ (2,265) |  | ¥ 2,265 |  |  |

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