
This photo taken on Nov. 22, 2025 shows ruddy shelducks at a reservoir in Shiyanghe River National Wetland Park in Minqin County of Wuwei City, northwest China's Gansu Province. The Hexi Corridor, spanning nearly 1,000 km in China's Gansu Province, is interspersed with oases, rivers, lakes, wetlands, and artificial reservoirs, providing favorable habitats and abundant food resources for migratory birds. Photo: Xinhua

An aerial drone photo taken on Nov. 14, 2025 shows whooper swans at the Xiaosugan lake wetland in Kazak Autonomous County of Aksay, northwest China's Gansu Province. The Hexi Corridor, spanning nearly 1,000 km in China's Gansu Province, is interspersed with oases, rivers, lakes, wetlands, and artificial reservoirs, providing favorable habitats and abundant food resources for migratory birds. Photo: Xinhua

An aerial drone photo taken on Nov. 14, 2025 shows a view of the Xiaosugan Lake wetland in Kazak Autonomous County of Aksay, northwest China's Gansu Province. The Hexi Corridor, spanning nearly 1,000 km in China's Gansu Province, is interspersed with oases, rivers, lakes, wetlands, and artificial reservoirs, providing favorable habitats and abundant food resources for migratory birds. Photo: Xinhua

An aerial drone photo taken on Nov. 22, 2025 shows ruddy shelducks at a reservoir in Shiyanghe River National Wetland Park in Minqin County of Wuwei City, northwest China's Gansu Province. The Hexi Corridor, spanning nearly 1,000 km in China's Gansu Province, is interspersed with oases, rivers, lakes, wetlands, and artificial reservoirs, providing favorable habitats and abundant food resources for migratory birds. Photo: Xinhua

This photo taken on Nov. 22, 2025 shows a great egret at a reservoir in Shiyanghe River National Wetland Park in Minqin County of Wuwei City, northwest China's Gansu Province. The Hexi Corridor, spanning nearly 1,000 km in China's Gansu Province, is interspersed with oases, rivers, lakes, wetlands, and artificial reservoirs, providing favorable habitats and abundant food resources for migratory birds. Photo: Xinhua

This photo taken on Nov. 12, 2025 shows black storks foraging at a wetland in Heihe Wetland National Nature Reserve in the city of Zhangye, northwest China's Gansu Province. The Hexi Corridor, spanning nearly 1,000 km in China's Gansu Province, is interspersed with oases, rivers, lakes, wetlands, and artificial reservoirs, providing favorable habitats and abundant food resources for migratory birds. Photo: Xinhua