Two Chinese high-speed railways with trains running at 350 kilometers (km) per hour are making important progress in construction. The first station on the Xi'an-Ankang High-Speed Railway has its main structure construction completed, and the Xi'an-Shiyan High-Speed Railway has achieved a phased progress with the successful breakthrough of the Tianzhushan No 2 tunnel in Shanyang county, Northwest China's Shaanxi Province.