In March 2010, news sites were abuzz with the announcement of a proposed Chinese-backed high-speed Eurasian rail line that could whip passengers between London and Beijing at speeds of up to 345 km/h (215 mph), completing the 17-country, 8 160 km (5 070 mi) journey in just two days.
https://basementgeographer.com/the-longest-train-ride-in-the-world/
https://basementgeographer.com/the-longest-train-ride-in-the-world/