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A migratory bird is seen in Xinying Bay of Danzhou, south China's Hainan Province, Dec. 10, 2019. As the temperature drops in north China, migratory birds arrived in Hainan to spend the winter. (Xinhua/Yang Guanyu)
A migratory bird is seen in Xinying Bay of Danzhou, south China's Hainan Province, Dec. 10, 2019. As the temperature drops in north China, migratory birds arrived in Hainan to spend the winter. (Xinhua/Yang Guanyu)