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Principal Accounting Policies (Details 6) ¥ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 CNY (¥) $ / ¥ | Dec. 31, 2021 USD ($) $ / ¥ | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019 CNY (¥)
Advertising Expense |  |  |  |
Advertising expenses | ¥ 3,762.8 | $ 590.5 | ¥ 3,782.1 | ¥ 1,679.3
Foreign currency translation |  |  |  |
Buying rate per US$ | 6.3726 | 6.3726 |  |
License right |  |  |  |
Intangible assets |  |  |  |
Estimated useful lives of assets | over the license period | over the license period |  |
Technology | Equal to or more than |  |  |  |
Intangible assets |  |  |  |
Estimated useful lives of assets | 7 years | 7 years |  |
Technology | Less than |  |  |  |
Intangible assets |  |  |  |
Estimated useful lives of assets | 10 years | 10 years |  |
Trademark |  |  |  |
Intangible assets |  |  |  |
Estimated useful lives of assets | 10 years | 10 years |  |

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