I don't think China respects the Unclese either. I believe it also has to do with the fact that Xi is a hell lot tougher and uncompromising than previous Chinese presidents.
Xi should get even tougher with the Japs-- Every time the Jap officials go worshiping their war criminals, China should reciprocate by sending officials to pay respects to the Nanking victims and let them burn offering of a Japanese maps with nuclear clouds-- hand-drawn-- over Hiroshima and Nagasaki