 The line is one of the segments of the Xuzhou–Lanzhou high-speed railway, a high-speed mainline from Lanzhou to Xuzhou, paralleling the existing Longhai Railway line.The densely populated corridor between Zhengzhou and Xi'an, both large regional centres, is home to some 100 million people.Its top speed is in operation, the minimum travel time between the two cities is 1 hour and 58 minutes, although in practice the journey takes more than two hours with a few intermediate stops.