Photo taken on Aug. 14, 2019 shows the site of a rock collapse at a section of the Chengdu-Kunming railway, southwest China. An unknown number of people were missing after a rock collapse in southwest China's Sichuan Province, the local railway authority said Wednesday. The rock collapse happened around 12:44 p.m. at a section of the Chengdu-Kunming railway in Ganluo County, according to China Railway Chengdu Group. Rescue work is underway. (Photo by Cao Shang/Xinhua)