Now if US can copy them
It would be a great idea if USA followed this idea and had fast trains between large cities such as Miami to New York etc, people would love to travel instead of waiting in the long lines at air ports, molested with impunity by the TSA and arrive at the destination to find your suit case in either relieved of some of its contents or crushed beyond repair.
I traveled once from London to Paris by the "EUROSTAR". I thought that was fast. But the Chinese have won this game hands down. Hats off to those engineers.