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LONG-TERM INVESTMENTS, NET - Investments accounted for at fair values, additional information (Details) - CNY (¥) ¥ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 14, 2017 | May 31, 2019 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Oct. 31, 2017
LONG-TERM INVESTMENTS, NET |  |  |  |  |  |
Investments in preferred shares |  |  | ¥ 5,879,424 | ¥ 1,226,856 |  |
Fair value |  |  | 5,717,276 | 1,014,400 |  |
Wealth management products |  |  |  |  |  |
LONG-TERM INVESTMENTS, NET |  |  |  |  |  |
Fair value changes in investments, net |  |  | 80,800 | 16,500 | ¥ 11,700 |
Investments in preferred shares |  |  | ¥ 5,537,500 | 896,920 |  |
Maturity period |  |  | 1 year |  |  |
Fair value |  |  | ¥ 5,615,222 | 925,664 |  |
Unlisted equity securities and loan receivables measured at fair value |  |  |  |  |  |
LONG-TERM INVESTMENTS, NET |  |  |  |  |  |
Investments in preferred shares |  |  | 245,076 | 233,088 |  |
Fair value |  |  | ¥ 48,380 | ¥ 32,572 |  |
IFM Investments Limited |  |  |  |  |  |
LONG-TERM INVESTMENTS, NET |  |  |  |  |  |
Percentage of ownership interest acquired |  |  | 37.60% | 37.60% |  |
Investments made |  | ¥ 308,000 | ¥ 438,000 |  |  |
Fair value of additional investment and loan |  | 120,100 |  |  |  |
Deemed marketing expense |  |  | 317,900 |  |  |
Fair value |  |  | 35,600 | ¥ 31,900 |  |
IFM Investments Limited | Secured loan to IFM controlling Shareholder |  |  |  |  |  |
LONG-TERM INVESTMENTS, NET |  |  |  |  |  |
Loan provided |  | ¥ 130,000 | ¥ 700 | ¥ 600 |  |
Percentage of ownership secured the loan |  | 17.50% |  |  |  |
IFM Investments Limited | Unlisted equity securities and loan receivables measured at fair value |  |  |  |  |  |
LONG-TERM INVESTMENTS, NET |  |  |  |  |  |
Percentage of ownership interest acquired |  |  |  |  |  | 10.00%
Number of preferred shares purchased |  |  |  |  |  | 308,084,916
Investments in preferred shares |  |  |  |  |  | ¥ 60,000
IFM Investments Limited | Investment in convertible note |  |  |  |  |  |
LONG-TERM INVESTMENTS, NET |  |  |  |  |  |
Convertible notes purchased | ¥ 40,000 |  |  |  |  |
Maturity period | 30 months |  |  |  |  |
Interest rate | 12.00% |  |  |  |  |

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