Really? Source, please... Because you're wrong. Most Mercedes and Audi cars, most of the original Buicks and Fords and Volkswagens, were imported to China - and there was a tariff applied (just like we apply tariffs to imported cars).
Now those companies sell enough cars there it's worthwhile to BUILD them there, and avoid the tariffs and the issues with corporate income tax. For much the same reason BMW, Mercedes, Honda and Toyota build cars here - avoid the tariffs.
You’re right they want our factories there, so they can steal the intellectual property.