Photo taken on Nov. 27, 2017 shows the protection net for Crested Ibis on the Xi'an-Chengdu high-speed railway in Yangxian County, northwest China's Shaanxi Province. A total of 33 kilometers of protection net is set along the two sides of the Xi'an-Chengdu high-speed railway on its Yangxian County section, which is easily recognised by Crested Ibis and can protect the animal from being hurt. (Xinhua/Shao Rui)