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Aerial photo taken on Dec. 15, 2019 shows the migrant birds at the Caizi Lake wetland in Anqing, east China's Anhui Province. A great number of migrant birds flied to the Caizi Lake wetland for wintering. (Xinhua/Zhang Duan)
Aerial photo taken on Dec. 15, 2019 shows the migrant birds at the Caizi Lake wetland in Anqing, east China's Anhui Province. A great number of migrant birds flied to the Caizi Lake wetland for wintering. (Xinhua/Zhang Duan)