Technology

this breakthrough was just Maglev

A hyperloop is just maglev in a vacuum. That's the hard part

The tubes have a geometric size error of less than 2 millimetres (0.1 inch) and must be capable of maintaining a vacuum state for extended periods, presenting significant challenges in fabrication and installation

didn't Musk releases the Hyperloop thing to try to prevent California from getting high-speed rail?

Yes, like he promised that Teslas could have their batteries changed instead of recharging to get more money from the government.

hasn't hyperloop been basically discredited as a realistic form of long distance travel

There hasn't really been any genuine effort until now. CASIC is the real deal and state owned

CASIC is the biggest missile weapon system developing and manufacturing enterprise in China. It is known for developing, researching and manufacturing air defense missile systems, cruise missile systems, solid-propellant rockets, space technological products and other technologies with products covering various fields of land, sea, air, and electromagnetic spectrum. CASIC has provided dozens of advanced missile equipment systems for various nations, and contributed to Chinese crewed space flight, lunar exploration and other Chinese national projects.