Okay, how ? Manufacturer sells the parts to distributors. They can't just opt to not sell their parts to essentially entirety of china (via distributors located

Okay, how ? Manufacturer sells the parts to distributors. They can't just opt to not sell their parts to essentially entirety of china (via distributors located there). And even if they somehow exclude those, who stops someone in any other country from just setting up shell company and reexporting the chips ?