I think in the last 30 years, there has been a lot of back and forth as to the future of what infantry looks like.
For the PLA, that would go even further back to the 80's. The Vietnam conflict finally got rid of semi-autos for good (which was way too long).
Then we had lessons for the Gulf War, which really deemphasized infantry.
Then we had the War on Terror which overemphasized things like house clearing, special forces, urban fighting, etc.
Now we are looking at the Ukraine war which is drone-drone-drone.
We've seen the PLA pick up bits and pieces of things from all of these conflicts, so it's possible that either there is no overall strategy in place yet, or in the process of things going back to the drawing board, the old (bad) habits stick around in the absence of replacement.