Does China have its own maglev medium-high speed train? If so, why develop high-speed trains? Is high-speed rail more environmentally friendly and energy-saving?

Yes, it is under further development. At present, China has a relatively mature medium-low speed magnetic levitation, while high-speed magnetic levitation is still developing. At that time, it was considered that high-speed rail had low safety, low maturity and low cost. After seven years of debate on wheel-rail or magnetic levitation, the Beijing-Shanghai high-speed railway finally chose wheel-rail However, at present, especially after the problems of Beijing-Shanghai high-speed rail, the safety of high-speed rail is controversial. Although maglev is still immature, according to the results at home and abroad, the accident rate is lower than that of high-speed rail. Although the one-time investment is slightly higher than that of high-speed rail, the maintenance cost is lower and the speed is one-third faster than that of high-speed rail. When you reach 400-500 kilometers, you can reach 800 kilometers at the earliest. But at that time, China was not mature on the high-speed maglev train, and there was no experience and precedent of commercial and long-distance operation abroad, so it chose the high-speed wheel-rail railway, which is now the high-speed rail.