I may be wrong but shipping via a third country doesn't work - I believe that Section 301 allows the US to re-assign the correct country of origin. Sure, some product may come in via this trick, but anything at scale would be found out. I doubt anyone in the US would mistake a BYD car from being a product from a country other than China.

I know very little however, so if someone with more knowledge on this can chime in on how this works practically, it would edifying.