A worker scatters foodstuffs, which attracts white and black swans in Yellow River Wetland in Sanmenxia, central China's Henan Province, Jan. 5, 2013. Yellow River Wetland is a National Natural Reserve with a total area of 68 thousands hectare in Henan Province. It's a bird breeding place with over 41 types of animals under first-grade and second-grade protection at the state level. (Xinhua/Wang Song)
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