Probably tracks also need to be upgraded.
单纯让动车速度提升并不难,单纯让动车速度提升并不难,但在速度之外,安全性、噪音、耗能、平稳性、舒适性等因素,也是影响能否投入商业运营的关键条件。要想实现时速450公里运行,不仅对列车有要求,对高铁线路也有要求。要想实现时速450公里运行,不仅对列车有要求,对高铁线路也有要求。
It is not difficult to simply increase the speed of a train. However, in addition to speed, factors such as safety, noise, energy consumption, stability, and comfort are also key conditions that affect whether it can be put into commercial operation. To achieve a speed of 450 kilometers per hour, there are requirements not only for trains, but also for high-speed rail tracks.