Comrades, I have made a mistake, the video from China Daily loaded on mobile and I see that he is actually pointing at the speed display above the carriage door, saying that the train was moving at 300 kph.
"We are now moving at about three and a half times the typical speed of an Amtrak transcontinental, and about twice its occasionally-reached top speed."
Agreed, it is absolutely my favourite way to travel, especially long distance. Air travel is such a hassle comparatively.
Something about the way trains rock puts me right to sleep too, and I struggle to sleep in a bed normally.