Trump will get the biggest of surprises when he comes out attacking China.
Just wait and watch. China hasn't really retaliated to the US war because it's a lose-lose situation. But when someone asks for a beating you can only oblige and respond in kind.
Imagine some random "disruptions" and "delays" from Apple's Chinese suppliers and their revenue actually falls by a 10% in a Quarter. Their whole stonk market would probably collapse and by then you would have some money suits going into the White House and "educating" Trump on how to behave
China could easily do this, and many other things that people haven't even thought about. The only reason it hasn't done such yet, is as I said, because it's a lose-lose proposition. But if Trump wants to play,
Let's play
Trump is not only breath takingly stupid, but he also has a strong oppositional streak if one looks at his history. The more you tell him he should or should not do something, the more likely he is to do the opposite of what is advised simply out of spite or to oppose you. Of course then when it blows up in his face, then he looks for someone to blame...such as the people that advised him to not do what he did.