Summary of Significant Accounting Policies - Short-term and long-term investment (Details) - CNY (¥) ¥ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Short-term investment | |||
| Short-term investment used as a collateral to issue of bank acceptance draft | ¥ 4,571,525 | ¥ 4,093,589 | |
| Debt Securities, Held-to-Maturity, Pledged Status [Extensible Enumeration] | us-gaap:AssetPledgedAsCollateralMember | us-gaap:AssetPledgedAsCollateralMember | |
| Interest income | ¥ 528,721 | ¥ 656,888 | ¥ 399,689 |
| Fair value change gain of investments | ¥ 136,752 | ¥ 127,489 | ¥ 186,914 |
| X | ||||||||||
- Definition Amount of unrealized gain (loss) on investment in debt and equity securities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Indicates pledged status of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount before accretion (amortization) of purchase discount (premium) of interest income on nonoperating securities. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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