Totally conjecture but I think everything of novelty and "importance" shown in the parade is a fake. Not meaning as a mockup - of course the displays are mockups, rather the entire show is using an opportunity to feed disinfo. Most people are not military enthusiasts at all and the propaganda value has been achieved. CCP good, progress, strong etc well done.
The rest is for the actual foreign observers. Whatever geometries and dimensions we've seen is probably an attempt to mislead and confuse. You can't hide things like destroyers, stealth fighters or even anti-ship missiles shown in videos operating and pretty much logged by enthusiasts and observers around the world as they are built and amassed. But for things like hypersonic glide vehicles and new drones just sitting as a mockup, one has to wonder and be skeptical. Why would any sane decision maker/s even allow for actual strategic weapons to be shown so candidly. Especially very new ones.
Stealth nozzle on sharp sword is far from impossible but you got to wonder about the two hypersonics. Way too sensitive. I was surprised they showed anything but the crowds expected something.
At face value, the drone has landing gear and maybe variable geometry. The folds at the end of the wings are supposed to be for subsonic vortices? The Xiamen University experimental hypersonic explored "double-waverider" design and take at look at how that thing looks. I'm not an aeronautical engineer so eyeballing isn't a method but it would still seem like the folds seen on this WZ-8 doesn't seem conducive to hypersonic flight but could be variable for greater controllability during recovery and landing speeds. Rocket engines to sustain hypersonic flight after booster detachment or being dropped from something? Not air breathing that's for sure. Wouldn't be showing such a thing anyway. The Russians and Americans haven't shown off a single hypersonic beyond artist impressions so I guess in this regard, China is strangely transparent.