It could also be a picture of a testing field for the modifications and attachments or even a leaked photo of dummy weapons for a movie or something like that. The reason is that we have never seen PLA SOF and to a certain degree PAP SOF equipped to this extent.
Given the sheer variety of other weapons, I assume that the QBZ-191s are real, though some parts of them look a bit suspect to me. For example the side picatinny rail piece on the side of the handguard of the QBZ-191 sitting closest to us, it appears a bit different and the guns themselves look a bit... rubbery.
This might just be the picture as I can't see why they would try to put a fake or practice QBZ-191 among other real guns.
This particular Weibo poster definitely works in the small arms industry. In what capacity, that I don't know. His Weibo feed features many genuine weapons, including models that are or were under testing but are not in service. That's not to say the QBZ-191s in this most recent image are real. The hand guards look too shiny and is of different design from what we had seen so far. It's possible they're the realistic training dummies we've heard about. Another possibility is that they are tinkering further with different hand guard designs and associated accessories. For all we know, these two examples could even be earlier prototypes from the rifle's develop stage.