Migratory birds pictured at section of Yellow River in NW China's Ningxia

Migratory birds are pictured at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region, Nov. 16, 2024. (Xinhua/Wang Peng)

An aerial drone photo taken on Nov. 16, 2024 shows migratory birds at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)

A migratory bird is pictured at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region, Nov. 16, 2024. (Xinhua/Wang Peng)

Migratory birds are pictured at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region, Nov. 16, 2024. (Xinhua/Wang Peng)

An aerial drone photo taken on Nov. 16, 2024 shows migratory birds at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)

An aerial drone photo taken on Nov. 16, 2024 shows migratory birds at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)

Migratory birds are pictured at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region, Nov. 16, 2024. (Xinhua/Wang Peng)

An aerial drone photo taken on Nov. 16, 2024 shows migratory birds at a section of the Yellow River in northwest China's Ningxia Hui Autonomous Region. (Xinhua/Wang Peng)