A worker from China Railway 11 Bureau Group measures the temperature of concrete during the concreting process at a beam fabrication construction site on the Lhasa-Nyingchi section of the Sichuan-Tibet Railway at the beam fabrication yard in Nang county, southwest China's Tibet autonomous region, May 9, 2020. Construction of the Sichuan-Tibet Railway, the second railway to go into Tibet, has been making steady progress. Recently, 47 tunnels along the Lhasa-Nyingchi section of the railway have been bored, laying a solid foundation for the operation of the section. (Photo/Yuan Quan)