Drilling completed on Guiyang-Nanning High-speed Railway's Yanjiazhai tunnel

Workers celebrate the completion of drilling for the Yanjiazhai tunnel on June 14. The Yanjiazhai tunnel is part of the Guiyang-Nanning High-speed Railway being constructed by China Railway 11 Bureau Group Co Ltd. The tunnel, located in Dushan county, in Southwest China's Guizhou province, is 1,670 meters long. The successful drill-through laid a solid foundation for further construction work for the railway, which is designed for trains traveling at a speed of 350 kilometers per hour. [Photo/Guiyang Daily]