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Principal Accounting Policies (Cost of revenues) (Details) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 CNY (¥) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 CNY (¥) | Dec. 31, 2014 CNY (¥)
Principal Accounting Policies [Abstract] |  |  |  |
Sales taxes and surcharges in cost of revenues | ¥ 119,767 | $ 17,250 | ¥ 122,502 | ¥ 129,768
Tax rate of value added tax and surcharges | 6.70% | 6.70% |  |
Applicable tax rate of cultural development fee for net advertising revenues | 3.00% | 3.00% |  |

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- Definition Applicable tax rate of cultural development fee for advertising services revenues + References No definition available. + Details
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- Definition Sales taxes include business tax and value added tax. Business tax is imposed by the Chinese government on revenues we report for the provision of taxable services, transfers of intangible assets and sales of immovable properties. + References No definition available. + Details
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- Definition Tax rate of value added tax and surcharges + References No definition available. + Details
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- References No definition available. + Details
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