Combination photo shows 4-month-old Panda "Bei Bei" of U.S. National Zoological Park meeting media after receiving a physical examination in Washington D.C., the United States, on Jan. 7, 2016. (Photo: Xinhua/BaoDandan)
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Combination photo shows 4-month-old Panda "Bei Bei" of U.S. National Zoological Park meeting media after receiving a physical examination in Washington D.C., the United States, on Jan. 7, 2016. (Photo: Xinhua/BaoDandan)
