He definitely would not be slagging them off. Ford set up a couple plants in China years ago, and have been continually adding more, don't know how many they have now, but their new battery plant will be in China within the next few years, or maybe they built it already.
But yeah, first rule of setting up shop in China, you don't talk bad about China(or industries or companies close to it's 'interests'). Doing so will net you a swift kick where the sun don't shine if you're doing business there. You kowtow and keep doing your business.
The US and EU will keep blocking Chinese cars as long as they can anyway(or at least setting up sufficient hurdles
car wrap advertising), so it won't be a that much of a big deal to them.