I went through the thread. It was speculated by two users that this is an improved CS/LR4, while providing no source or proof. Neither user is credible: one of them is an 'artist' out of Hong Kong.
There appear to be two (competing?) variants for the new sniper rifle program. Furnitures differ considerably; one appears to have a folding stock.
The Weibo poster I cited in my original post is far more credible and clearly states that this rifle is a clean-sheet design that took only 10 months.