Aerial photo taken on Oct 29, 2021 shows migrant birds at Caofeidian wetland in Tangshan, North China's Hebei province. [Photo/Xinhua]
Migrant birds are seen at Caofeidian wetland in Tangshan, North China's Hebei province, Oct 29, 2021. [Photo/Xinhua]
Migrant birds are seen at Caofeidian wetland in Tangshan, North China's Hebei province, Oct 29, 2021. [Photo/Xinhua]
Migrant birds are seen at Caofeidian wetland in Tangshan, North China's Hebei province, Oct 29, 2021. [Photo/Xinhua]
Migrant birds are seen at Caofeidian wetland in Tangshan, North China's Hebei province, Oct 29, 2021. [Photo/Xinhua]
Migrant birds are seen at Caofeidian wetland in Tangshan, North China's Hebei province, Oct 29, 2021. [Photo/Xinhua]
Migrant birds are seen at Caofeidian wetland in Tangshan, North China's Hebei province, Oct 29, 2021. [Photo/Xinhua]
