What's Going to Happen in Phase One of a Chinese Attack?

In the lead up to a Chinese attack, it's very important to keep in mind that the world doesn't exactly know what's going to happen. That's also true for multinational firms and investors, right? So they're going to be operating under conditions of extreme uncertainty. If you assume the perhaps improbable really bad outcomes going to happen, that entails a whole set of aggressive actions like divestment from China. But again, that's really dependent on the credibility of US warnings.