![Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)](http://www.ecns.cn/hd/2018/09/14/8119375db2b14436bf1be41a626c4351.jpg)
Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)
![Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)](http://www.ecns.cn/hd/2018/09/14/b5676332465f472db891c3105b6b261e.jpg)
Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)
![Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)](http://www.ecns.cn/hd/2018/09/14/16e145f11b0a4befa5f393ce92943420.jpg)
Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)
![Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)](http://www.ecns.cn/hd/2018/09/14/917e84e8500144c690fc9376fcd742a0.jpg)
Black-necked cranes, under first-class state protection, are seen at a grassland in Sunan Yugur Autonomous County, Northwest China’s Gansu Province, Sept. 12, 2018. The estimated population of the black-necked cranes in the county has risen thanks to increased efforts in environmental protection. (Photo: China News Service/An Jianbin)