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Short-term Investments (Details) - CNY (¥) ¥ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Short-term Investments |  |  |
Investment income related to short-term investments | ¥ 342,600 | ¥ 639,800 | ¥ 580,700
Short-term investments |  |  |
Short-term Investments |  |  |
Cost | 7,563,805 | 12,081,868 |
Unrealized Gains/(Losses) | 58,868 | 199,680 |
Estimated Fair Value | ¥ 7,622,673 | ¥ 12,281,548 |
Short-term investments | Equal to or more than |  |  |
Short-term Investments |  |  |
Short-term investments, effective yields (as a percent) | 1.72% | 2.25% |
Short-term investments | Less than |  |  |
Short-term Investments |  |  |
Short-term investments, effective yields (as a percent) | 5.00% | 4.40% |

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- Definition Rate of interest on investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27232-111563 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=126970911&loc=d3e27161-111563 + Details
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