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Income Taxes (Combined effects of income tax expense exemption and other preferential tax benefits) (Details) ¥ / shares in Units, $ / shares in Units, ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 CNY (¥) ¥ / shares | Dec. 31, 2016 USD ($) $ / shares | Dec. 31, 2015 CNY (¥) ¥ / shares | Dec. 31, 2014 CNY (¥) ¥ / shares
Income Taxes [Abstract] |  |  |  |
Preferential tax rate effect | ¥ 9,878 | $ 1,423 | ¥ 10,073 | ¥ 41,157
Basic net income per share effect | (per share) | ¥ 0.02 | $ 0.002 | ¥ 0.02 | ¥ 0.07

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- Definition The amount of income taxes from which a reporting entity is exempt or for which it will receive a reduction in income taxes as a result of the income tax holiday granted by the taxing jurisdiction. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817 + Details
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- Definition Per share amount effect of the income tax benefit resulting from the income tax holidays granted by taxing jurisdictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 11.C) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330215-122817 + Details
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