Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans flying above the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)
Photo taken on March 12, 2019 shows swans at the Yellow River wetland in Dalad Qi, Ordos, north China's Inner Mongolia Autonomous Region. (Xinhua/Peng Yuan)