So they actually put the QBZ-191 series on display at Zhuhai Airshow? Does that mean the 5.8mm small arms family may put into Norinco export catalog?
Not necessarily.
They are showing increasing domestic only systems across all domains (air, ground, naval) at Zhuhai, beyond only showcasing export oriented products.
I wouldn't be surprised if the eventually had a 191 export variant chambered in 556 or 545, but I think the current display is more just to indicate "we are showing this new rifle that we are using".