Aerial photo taken on Dec. 30, 2021 shows the frozen surface of the Yellow River in Shizuishan, northwest China's Ningxia Hui Autonomous Region. The Ningxia reach of the Yellow River started to freeze over Wednesday as the temperature drops recently. (Xinhua/Wang Peng)
Aerial photo taken on Dec. 30, 2021 shows the frozen surface of the Yellow River in Shizuishan, northwest China's Ningxia Hui Autonomous Region. The Ningxia reach of the Yellow River started to freeze over Wednesday as the temperature drops recently. (Xinhua/Wang Peng)
Aerial photo taken on Dec. 30, 2021 shows the frozen surface of the Yellow River in Shizuishan, northwest China's Ningxia Hui Autonomous Region. The Ningxia reach of the Yellow River started to freeze over Wednesday as the temperature drops recently. (Xinhua/Wang Peng)
Photo taken on Dec. 30, 2021 shows the frozen surface of the Yellow River in Shizuishan, northwest China's Ningxia Hui Autonomous Region. The Ningxia reach of the Yellow River started to freeze over Wednesday as the temperature drops recently. (Xinhua/Wang Peng)
Aerial photo taken on Dec. 30, 2021 shows the frozen surface of the Yellow River in Shizuishan, northwest China's Ningxia Hui Autonomous Region. The Ningxia reach of the Yellow River started to freeze over Wednesday as the temperature drops recently. (Xinhua/Wang Peng)
Aerial photo taken on Dec. 30, 2021 shows the frozen surface of the Yellow River in Shizuishan, northwest China's Ningxia Hui Autonomous Region. The Ningxia reach of the Yellow River started to freeze over Wednesday as the temperature drops recently. (Xinhua/Wang Peng)
Photo taken on Dec. 30, 2021 shows the frozen surface of the Yellow River in Shizuishan, northwest China's Ningxia Hui Autonomous Region. The Ningxia reach of the Yellow River started to freeze over Wednesday as the temperature drops recently. (Xinhua/Wang Peng)