The first round gauge railway in 1825, after 140 years of effort, it exceeded its operating speed of 200 km / h from 200 km / h to 300 km / h and spent nearly 30 years, although the technology is still perfect and Development and continue to improve the speed has little room, and difficult is great. It should also be noted that, to improve the speed of the wheel gauge railway is expensive, 300 km / h high-speed rail cost than 200 km / h high-speed railway quasi nearly twice than 120 km / h in eight common rail high school times and continue to improve the speed, its cost will rise sharply.
Compared with the world's first maglev train is a small model appeared in Germany in 1969, Japan was in 1972 Zaochu. May be only a decade later in 1979, the maglev train technology on the creation of 517 km / hour speed record. Technology has matured, can enter the 500 km / h and practical operation of the construction phase.