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Photo taken on Feb. 1, 2020 shows a healthy certificate for a traveler discharged from medical observation in Chengdu, capital of southwest China's Sichuan Province. Over 60 travelers from Wuhan, the hardest-hit city of the epidemic outbreak in central China, or who used to travel to Wuhan in the past few days, were discharged from medical observation and ended the quarantine on Saturday. (Xinhua/Zhang Chaoqun)?
