But of course the "top speed" without passenger is much much higher.
>The world record for a conventional wheeled passenger train is held by France's TGV (Train à Grande Vitesse), set in 2007 when it reached 574.8 km/h (357.2 mph) on a 140 km section of track.[1]
>Japan's experimental maglev train L0 Series achieved 603 km/h (375 mph) on a 42.8 km magnetic levitation track in 2015
I daresay it might be a record for China.
"Driving a Mercedes-Benz W125 Rekordwagen, essentially a W125 with streamlined bodywork and a larger engine, Caracciola set a new average speed of 432.7 kilometres per hour (268.9 mph) for the flying kilometre and 432.4 kilometres per hour (268.7 mph) for the flying mile..." -https://en.wikipedia.org/wiki/Rudolf_Caracciola