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Operations - Initial public offering ("IPO") and followed offerings (Details) $ / shares in Units, ¥ in Thousands |  | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Oct. 03, 2022 | Jan. 31, 2023 CNY (¥) shares | Jan. 31, 2023 USD ($) shares | Dec. 31, 2023 CNY (¥) | Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 USD ($) | Jan. 31, 2023 USD ($) $ / shares | Nov. 30, 2021 USD ($)
Operations and Reorganization [Line Items] |  |  |  |  |  |  |  |
Net proceeds from the offering, after deducting offerings expenses |  |  |  | ¥ 2,689,380 |  |  |  |
Convertible senior notes aggregate principal amount |  |  |  | 652 | ¥ 95,692 |  |  |
Convertible senior notes due December 2026 [Member] |  |  |  |  |  |  |  |
Operations and Reorganization [Line Items] |  |  |  |  |  |  |  |
Convertible senior notes aggregate principal amount |  | ¥ 2,600,000 |  | 3,062,600 | ¥ 95,600 |  | $ 384,800,000 | $ 1,600,000,000
Percentage of convertible notes |  | 0.50% |  |  |  |  | 0.50% |
Hong Kong Stock Exchange [Member] |  |  |  |  |  |  |  |
Operations and Reorganization [Line Items] |  |  |  |  |  |  |  |
Date of conversion of the company from the secondary listing series to primary listing | Oct. 03, 2022 |  |  |  |  |  |  |
ADSs |  |  |  |  |  |  |  |
Operations and Reorganization [Line Items] |  |  |  |  |  |  |  |
Ordinary shares, issued (in shares) | shares |  | 15,344,000 | 15,344,000 |  |  |  |  |
Price per share | $ / shares |  |  |  |  |  |  | $ 26.65 |
Net proceeds from the offering, after deducting offerings expenses |  | ¥ 2,689,400 | $ 396,900,000 |  |  |  |  |
ADSs | Convertible senior notes due December 2026 [Member] |  |  |  |  |  |  |  |
Operations and Reorganization [Line Items] |  |  |  |  |  |  |  |
Convertible senior notes aggregate principal amount | $ |  |  |  |  |  |  |  | $ 1,000
Debt instrument repurchased amount |  | ¥ 2,200,000 |  | ¥ 2,200,000 |  | $ 331,200,000 | $ 331,200,000 |

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