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Photo taken on May 1, 2011 shows the warning sign of NO SMOKING at a ticket outlet in Hangzhou, east China's Zhejiang Province. A revised regulation from China's health ministry on smoking ban in public venues came into effect on May 1, 2011. (Xinhua/Han Chuanhao)
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A man orders the warning signs of NO SMOKING for sale at a plate shop in Hangzhou, east China's Zhejiang Province, May 1, 2011. A revised regulation from China's health ministry on smoking ban in public venues came into effect on May 1, 2011.(Xinhua/Han Chuanhao)
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