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v3.26.1

Summary of Significant Accounting Policies - Additional Information (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2025 CNY (¥) segment | Dec. 31, 2025 USD ($) segment | Dec. 31, 2024 CNY (¥) | Dec. 31, 2023 CNY (¥) | Dec. 31, 2025 USD ($)
Functional currency and foreign currency translation |  |  |  |  |
Foreign currency translation adjustment | ¥ (2,860) | $ (409) | ¥ 149,668 | ¥ 11,514 |
Exchange rate (RMB per USD 1.00) | 6.9931 |  |  |  | 6.9931
Short-term investment |  |  |  |  |
Short-term investments | ¥ 19,755,809 |  | 14,137,566 |  | $ 2,825,043
Carrying value of the investment | 979,071 |  | 173,918 |  |
Restricted as collateral for bank borrowings and letter of guarantee | 19,369,931 |  | 11,372,254 |  |
Current expected credit losses |  |  |  |  |
Expected credit loss expense | 46,691 |  | 3,761 | 26,315 |
Expected credit loss provision - current | 48,590 |  | 50,594 |  |
Expected credit loss provision - non-current | 14,699 |  | 59,386 |  |
Long-term investments |  |  |  |  |
Impairment recognized, long term investments | 0 |  | 0 | 0 |
Impairment recognized, long-lived assets | 0 |  | 55,331 | 0 |
Sales and marketing expenses |  |  |  |  |
Advertising Expense | 1,507,447 |  | 1,480,886 | 1,242,941 |
Employee benefits |  |  |  |  |
Employee benefit expenses | 3,059,580 |  | 3,005,528 | 2,349,966 |
Dividends |  |  |  |  |
Dividends | ¥ 0 |  | 0 | ¥ 0 |
Segment reporting |  |  |  |  |
Number of segments | segment | 1 | 1 |  |  |
Fair Value, Inputs, Level 2 |  |  |  |  |
Short-term investment |  |  |  |  |
Short-term investments | ¥ 305,433 |  | 6,109,606 |  |
Fair Value, Inputs, Level 3 |  |  |  |  |
Short-term investment |  |  |  |  |
Carrying value of the investment | ¥ 979,071 |  | ¥ 1,277,068 |  |

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