China just launched the worlds fastest ground transport a 600kmh maglev train now connecting Shanghai and Beijing
No they didn't. They've successfully tested a new maglev which could potentially connect SH and BJ, but the line doesn't exist yet.
They already tested maglev in Shanghai years ago, and then decided to go with conventional HSR for their national network, so this again might go nowhere if it's not deemed to be an efficient or practical enough system.
Personally I don't see it happening any time soon (though I'd be excited to try it if it is built). You can already get from Beijing to Shanghai by train in like 4 hours; building a whole new high-tech line seems like a lot of work just to save an hour or two.