A reminder, Mr. Trump: "Location, location, location".
As for "Apple will ... just move its company to China": unless, of course, Mr. Trump (if ever mistakenly actually elected PoTUS) also simultaneously holds out a carrot that takes the form of a tax holiday on repatriated profits--giving US companies reason to bring home the bacon and, thereafter, begin producing domestically in earnest. It takes a considerable length of time to spend as little as a billion $US. A couple of dozen of those and you're talking terms--two, maybe three.