The Guiyang–Nanning high-speed railway is a high-speed railway between Guiyang and Nanning in China. The railway will be 512 km in length, of which 482 km is newly build. Travel time between the two cities will be cut from 10 hours to 2.5 when the railway opens in 2023. It will be part of the Baotou (Yinchuan)–Hainan corridor.