Also note the last photo of my post shows two types of ballistic helmets: one provides greater coverage, the other exposes the ears. The ones with the exposed ears seem to sit particularly high, but part of that probably has to do with these helmets being physically 'tall'. Anyway, I hope the sitting height is adjustable.
As for the vests, they don't appear to be able to accomodate ballistic inserts. If that's the case, then the exposed chest area makes no practical difference. If they do accomodate inserts, then I wonder if the vests are supposed to be worn in tandem with the wrap-around neck armor shown in your photo. If that's the case, the low coverage is also ok. But for all we know, it could just be a simple but improved tactical vest, issued to the troops for training purposes and low-intensity scenarios, because after all, China hasn't traditionally issued armor on a large scale.
If you go back to the very first page of this thread, you'll see my posts showing various Chinese tactical vests, many of which have high chest coverage and accomodate inserts. So I think the latest vests you see are probably just a simple tactical vests that don't accomodate inserts.
I would be surprised if the vests did not have ballistic insert to be honest. Considering the various new technology doodads they are equipped with on the vest and the helmet, a ballistic insert would be a weird thing to skimp out on.
The BDU and vest they're wearing in the photos from your post seem to be the same as posted a month ago earlier in the thread, and I think it might be the perspective but in those longer distance photos I don't see anything suggesting they don't have the space or the design to accommodate inserts: https://www.sinodefenceforum.com/in...body-armor-nvgs-etc.t8198/page-23#post-518582
That said this area isn't my forte...