China shows weakness by attacking foreign critics
It is a warning that China is so fragile a state that it cannot tolerate criticism by anyone. This is a sign that the regime fears what others are saying about it and is willing to forego commerce to shut them up. It is returning to its totalitarian roots as it hunkers down. Hong Kong has become a dilemma for the regime. It can't put a whole city in jail and it can't engage in a Mao-style genocide without significant repercussions.