Obviously, if businesses were to make goods in the U.S., they wouldn't pay tariff for them. But if companies do as Trump asks, then the U.S.' government can't raise tariff revenue from them. Consequently America's public debt could rise, and American people could pay a high price for Trump's reciprocal tariffs. Not to mention of a country's ability to produce a particular good, such as wine, spirits, and food, at a lower cost compared to other nations.
On the China front, while these measures may trigger concern over their economic impact, they are unlikey to undermine Beijing's long-term manufacturing dominance.
Have a nice weekend!