Posted by 206 institute's magazine on Weibo a few days ago, but nothing has been posted here yet. Quite a bit of stuff for such a short Weibo post.
Rough translation:
The research done on the new rifle (QBZ-191) includes the following area: overall design and layout of the rifle, gun mechanics design (I think this refers to the trigger, recoil and gas systems of the rifle), ammunition, digital combat optic, accessories, ergonomics, new material and production techniques, barrel durability, accuracy, simulation analysis. There has been a drastic increase in the gun's anti-corrosion capability, the rifle can withstand wear and tear much better, the mechanisms can self lubricate to a certain degree and the surface finish of the rifle is also a lot better than previous rifles. The most vital breakthrough for the rifle includes the following 3 things: 1st, the barrel life or durability has increased drastically. Second, the accuracy of the rifle has been increased drastically. Finally, the problem with regards to the lowering of accuracy under extreme conditions has been solved completely (the accuracy of the rifle remains consistent regardless of usage and condition, I heard this was a significant problem for the early versions of type 95)