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Ruddy shelducks rest at the Qili Lake in Xuyi County, east China's Jiangsu Province, Dec. 3, 2017. An increasing number of migratory birds rest here on their way to the south during winter time. (Xinhua/Zhou Haijun)
Ruddy shelducks rest at the Qili Lake in Xuyi County, east China's Jiangsu Province, Dec. 3, 2017. An increasing number of migratory birds rest here on their way to the south during winter time. (Xinhua/Zhou Haijun)