A group of wild geese fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of wild geese fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of wild geese fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of wild geese fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of wild geese fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of cranes fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of cranes fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of cranes stand in Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of wild geese fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of wild geese fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)
A group of cranes fly over Yellow River Wetland in Changyuan County, central China's Henan Province, Dec. 25, 2018. (Xinhua/Feng Dapeng)