I don't think that's necessarily a bit. I'm not a train watcher guy but I can relate from the bicycle sphere.
Bicycle drivetrain parts were an oligarchy at best, a duopoly between SRAM and Shimano at worst for the past 20 years or so - discounting the really high end or the oddball stuff with nigh 0 market share. Everything from china was obviously decried as a cheap shitty knockoff of those parts - having no experience with any of it, I can't tell you how true it was.
But more and more I see people using shit ordered of AliExpress, Temu and such because prices have dropped so much even if you have to buy two because the QA is kind of ass you still come out ahead. Fuck I see people recommending carbon frames by now and those fail fucking catastrophically if they fail. Real vibe shift going on there.
That's over 2000 mph there's no way a train is going that fast without fucking rockets strapped to the back. The 1000km is just under the speed of sound but things get much harder past that. Plus breaking the sound barrier commercially is generally a really bad idea.
Not taking anything away from this train because it's already moving at or beyond commercial jet speeds here but I don't see them hitting 4000km for commercial use.