The line has eight stations, including three existing stations, and 89km of tunnels and bridges.
China National Railways (CR) will initially operate 10 pairs of EMUs a day from Liupanshui, connecting with a number of destinations including Shanghai, Guangzhou, Chengdu and Chongqing.
The line is an extension of the Shanghai - Kunming high-speed line, and connects Liupanshui to the national high-speed network.
Tickets for services on the line went on sale on July 7.
For detailed data on high-speed projects around the world, subscribe to IRJ Pro.