They say they want peace and are willing to hold talks, I am mot sure what your getting at, in no war ever has the beginning of peace talks been the cesation of the war, and how the war ends is determined by said peace talks, talks that of right bow are not happening.
Now if you are trying to argue that the mere act of trying to hold peace talks or offering to hold peace talks, or holding peace talks is taking a position in the war? I dont think we need to inform Switzerland that they have infact never been nutral in any conflict they mediated.
As for what China wants, they have stated all they want is peace many times, they do not have a horse in the race on who gets what, that makes them the ideal mediators.