This photo taken on October 28, 2025 shows migratory birds arriving at the Tiaozini Wetland in Dongtai, Yancheng, to spend the winter. Their arrival is also considered a sign of the area's improving ecological environment. (Photo/CFP)

This photo taken on October 28, 2025 shows migratory birds arriving at the Tiaozini Wetland in Dongtai, Yancheng, to spend the winter. Their arrival is also considered a sign of the area's improving ecological environment. (Photo/CFP)

This photo taken on October 28, 2025 shows migratory birds arriving at the Tiaozini Wetland in Dongtai, Yancheng, to spend the winter. Their arrival is also considered a sign of the area's improving ecological environment. (Photo/CFP)

This photo taken on October 28, 2025 shows migratory birds arriving at the Tiaozini Wetland in Dongtai, Yancheng, to spend the winter. Their arrival is also considered a sign of the area's improving ecological environment. (Photo/CFP)