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Ordinary Shares (Details) $ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands, $ in Thousands |  |  |  | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 17, 2020 $ / shares shares | Sep. 02, 2020 $ / shares shares | Jun. 15, 2020 $ / shares shares | Sep. 30, 2025 CNY (¥) shares | Sep. 30, 2025 USD ($) $ / shares shares | Sep. 30, 2025 HKD ($) shares | Apr. 30, 2025 CNY (¥) shares | Apr. 30, 2025 HKD ($) $ / shares shares | Dec. 31, 2024 USD ($) $ / shares shares | Nov. 30, 2024 shares | Dec. 31, 2025 CNY (¥) shares | Dec. 31, 2025 USD ($) $ / shares shares | Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2021 CNY (¥) shares | Dec. 31, 2021 USD ($) shares | Sep. 30, 2025 $ / shares | May 31, 2024 shares | Dec. 31, 2023 USD ($) shares
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  |  |  |  | $ 0.00025 |  |  |  |  |  |  |
Share capital, value authorized | $ |  |  |  |  |  |  |  |  | $ 1,000 |  |  | $ 1,000 |  |  |  |  |  |  |
Share capital, shares authorized |  |  |  |  |  |  |  |  | 4,000,000,000 |  |  | 4,000,000,000 |  |  |  |  |  |  |
Ordinary shares, shares authorized |  |  |  |  |  |  |  |  | 4,000,000,000 |  |  | 4,000,000,000 |  |  |  |  |  |  |
Shares authorized, class to be determined |  |  |  |  |  |  |  |  | 1,219,469,778 |  |  | 1,219,469,778 |  |  |  |  |  |  |
Proceeds from issuance of ordinary shares, net of issuance costs |  |  |  |  |  |  |  |  |  |  | ¥ 11,854,716 | $ 1,695,202 |  | ¥ 20,962,289 |  |  |  |  |
Ordinary shares, shares issued |  |  |  |  |  |  |  |  | 2,094,978,828 |  |  | 2,477,224,852 |  |  |  |  |  |  |
Total amount released from treasury stock | ¥ |  |  |  |  |  |  |  |  |  |  | ¥ 115,400 |  | ¥ 105,700 |  |  |  |  |  |
Ordinary shares, shares outstanding |  |  |  |  |  |  |  |  | 2,091,505,895 |  |  | 2,474,273,324 |  |  |  |  |  |  |
CYVN Entities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment, Aggregate Cost | $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,943,500
Class A Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0.00025 |  |  | $ 0.00025 |  |  |  |  |  |  |
Ordinary shares, shares authorized |  |  |  |  |  |  |  |  | 2,632,030,222 |  |  | 2,632,030,222 |  |  |  |  |  |  |
Number of newly issued ordinary shares |  |  |  | 20,995,000 | 20,995,000 | 20,995,000 | 136,800,000 | 136,800,000 |  |  |  |  |  |  |  |  |  |  |
Share issue price (in dollars per share) | $ / shares |  |  |  |  |  |  |  | $ 29.46 |  |  |  |  |  |  |  |  | $ 43.36 |  |
Number of ordinary shares in each ADS |  |  |  |  |  |  |  |  | 51,467,289 |  |  | 51,467,289 |  |  |  |  |  |  |
Proceeds from issuance of ordinary shares, net of issuance costs |  |  |  | ¥ 831,195 |  | $ 910,343 | ¥ 3,684,893 | $ 4,030,130 |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, shares issued |  |  |  |  |  |  |  |  | 1,946,478,828 |  |  | 2,328,724,852 |  |  |  |  |  |  |
Number of shares agreed to be lent |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,000,000 |
Ordinary shares, shares outstanding |  |  |  |  |  |  |  |  | 1,943,005,895 |  |  | 2,325,773,324 |  |  |  |  |  |  |
Class A Ordinary Shares | CYVN Entities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, shares issued |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 378,695,543
Class B Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, shares authorized |  |  |  |  |  |  |  |  | 0 |  |  | 0 |  |  |  |  |  |  |
Class C Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary shares, par value (in dollars per share) | $ / shares |  |  |  |  |  |  |  |  | $ 0.00025 |  |  | $ 0.00025 |  |  |  |  |  |  |
Ordinary shares, shares authorized |  |  |  |  |  |  |  |  | 148,500,000 |  |  | 148,500,000 |  |  |  |  |  |  |
Ordinary shares, shares issued |  |  |  |  |  |  |  |  | 148,500,000 |  |  | 148,500,000 |  |  |  |  |  |  |
Ordinary shares, shares outstanding |  |  |  |  |  |  |  |  | 148,500,000 |  |  | 148,500,000 |  |  |  |  |  |  |
American Depositary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of newly issued ordinary shares | 78,200,000 | 101,775,000 | 82,800,000 | 188,095,918 | 188,095,918 | 188,095,918 |  |  |  |  |  |  |  |  |  |  |  |  |
Share issue price (in dollars per share) | $ / shares | $ 39 | $ 17 | $ 5.95 |  | $ 5.57 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of ordinary shares, net of issuance costs |  |  |  | ¥ 7,444,392 | $ 1,047,694 |  |  |  |  |  |  |  |  |  |  |  |  |  |
American Depositary Shares | Convertible notes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued upon conversion |  |  |  |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
American Depositary Shares | Convertible Senior Notes Due 2027 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Shares issued upon conversion |  |  |  |  |  |  |  |  | 27,690,071 | 27,690,071 |  |  |  |  |  |  |  |  |
American Depositary Shares | At-the-market equity offering program |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ordinary Shares |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of ordinary shares in each ADS |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 53,292,401 | 53,292,401 |  |  |
Proceeds from issuance of ordinary shares, net of issuance costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  | ¥ 12,677,554 | $ 1,974,000 |  |  |

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