Russia today is probably the only and the last ally or at least partner against the west that China can count on and you want to step on them while they are down? why? Don't miss the forest for the trees. China is in a life and death struggle against America and its allies. Can I annex Russia territory? This is the question that the Americans want to tempt you to ask, to cause friction between China and Russia. When Russians see this, they will become doubtful of Chinese intention.