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Swans rest at the Mao'er Lake wetland in Xuyi County, east China's Jiangsu Province, Nov. 12, 2018. Increasing number of migratory birds choose to spend winter in Xuyi in recent years. (Xinhua/Zhou Haijun)
Swans rest at the Mao'er Lake wetland in Xuyi County, east China's Jiangsu Province, Nov. 12, 2018. Increasing number of migratory birds choose to spend winter in Xuyi in recent years. (Xinhua/Zhou Haijun)