A man displays his health certificate after quarantine is lifted, Jinan, East China's Shandong Province, May 18, 2009. The 38 people, including 35 passengers and three crew members who had close contacts with flu patient surnamed Lv in the same car of train D41 from Beijing to Shandong's capital Jinan on May 11, didn't show any symptom of being infected during the seven days in quarantine. [Xinhua]