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Commitments and Contingencies - Litigation, Long-term Liabilities for Uncertain Tax Positions (Details) $ in Thousands | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 28, 2020 CNY (¥) | Apr. 30, 2018 CNY (¥) | Dec. 31, 2016 CNY (¥) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 CNY (¥)
Loss Contingencies |  |  |  |  |  |
Uncertain tax positions |  |  |  | ¥ 27,612,000 | $ 3,966 | ¥ 26,131,000
Subsequent Event |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |
Amount of damages awarded to plaintiffs | ¥ 1,000,000 |  |  |  |  |
Claims about infringement of copyright and unauthorized selling on the Group's website and mobile applications for literature work |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |
Related claim for damages |  | ¥ 99,800,000 | ¥ 235,800,000 |  |  |
Maximum actual income the Group generated from such literature work |  |  | ¥ 1,500 |  |  |

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