Then China and Vietnam should stop trading with the US, right?

EDIT: To the downvoters: this is a legitimate question. I would love for such trade to stop, I hear it would only cost China $500 billion. But I'm worried that them doing that would cause the US to be more forceful in trying to get their resources and I think AES states are trying to avoid that. Even if China could militarily hand the US its ass, the damage is still a concern.