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Schedule I - Additional Information of Parent Company - Condensed Statements of Cash Flows (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2023 CNY (¥) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 CNY (¥) | Dec. 31, 2021 CNY (¥)
Condensed Cash Flow Statements Captions [Line Items] |  |  |  |
Cash (used in) provided by operating activities | ¥ 243,898 | $ 34,351 | ¥ 881,297 | ¥ (1,017,962)
Cash flows from investing activities: |  |  |  |
Purchase of long-term investments | (120,900) | (17,028) | (31,844) | (215,472)
Purchases of short-term investments | (421,798) | (59,409) | (666,252) | (787,217)
Cash (used in) provided by investing activities | 172,013 | 24,228 | (516,683) | (670,402)
Cash flows from financing activities: |  |  |  |
Proceeds from exercise of options | 2,822 | 397 | 2,864 |
Repurchase of ordinary shares | (160,068) | (22,545) | (217,920) |
Repayment for short-term borrowings | (397,966) | (56,052) | (156,970) | (560,972)
Proceeds from issuance of convertible redeemable preferred shares |  |  |  | 1,138,232
Proceeds from IPO, net of issuance cost of RMB46,931 |  |  |  | 1,488,866
Cash provided by (used in) financing activities | 68,703 | 9,677 | (186,043) | 2,289,623
Net increase in cash, cash equivalents and restricted cash | 487,070 | 68,602 | 196,984 | 588,266
Cash, cash equivalent and restricted cash at the beginning of the year | 1,703,626 | 239,951 | 1,506,642 | 918,376
Cash, cash equivalent and restricted cash at the end of the year | 2,190,696 | 308,553 | 1,703,626 | 1,506,642
Supplemental cash flow disclosures of continuing operations: |  |  |  |
Interest expenses paid | 7,056 | 994 | 6,163 | 16,778
Supplemental disclosure of non-cash investing and financing activities: |  |  |  |
Exercise of warrant |  |  |  | 10,345
Parent Company |  |  |  |
Condensed Cash Flow Statements Captions [Line Items] |  |  |  |
Cash (used in) provided by operating activities | 7,869 | 1,108 | 37,835 | (4,295)
Cash flows from investing activities: |  |  |  |
Purchase of long-term investments |  |  | (12,644) | (32,427)
Purchases of short-term investments | (71,570) | (10,080) |  |
Investments in and loan to subsidiaries' and former VIE's subsidiaries | (14,573) | (2,052) | (595,130) | (2,589,491)
Collection of investments in and loan to subsidiaries' and former VIE's subsidiaries | 223,171 | 31,433 | 804,743 |
Cash (used in) provided by investing activities | 137,028 | 19,301 | 196,969 | (2,621,918)
Cash flows from financing activities: |  |  |  |
Proceeds from exercise of options | 2,822 | 397 | 2,864 |
Repurchase of ordinary shares | (160,068) | (22,545) | (217,920) |
Repayment for short-term borrowings |  |  | (30,720) | (32,230)
Proceeds from issuance of convertible redeemable preferred shares |  |  |  | 1,138,232
Proceeds from IPO, net of issuance cost of RMB46,931 |  |  |  | 1,488,866
Cash provided by (used in) financing activities | (157,246) | (22,148) | (245,776) | 2,594,868
Net increase in cash, cash equivalents and restricted cash | (12,349) | (1,739) | (10,972) | (31,345)
Cash, cash equivalent and restricted cash at the beginning of the year | 34,548 | 4,866 | 45,520 | 76,865
Cash, cash equivalent and restricted cash at the end of the year | ¥ 22,199 | $ 3,127 | 34,548 | 45,520
Supplemental cash flow disclosures of continuing operations: |  |  |  |
Interest expenses paid |  |  | ¥ (1,297) | (4,238)
Supplemental disclosure of non-cash investing and financing activities: |  |  |  |
Exercise of warrant |  |  |  | ¥ 10,345

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