This problem is one that is so large its hard to even fathom, and most of the goals aren't even related to the idea of selling stolen IP for net profit.
The goal for them is to build large scale infrastructure fast in a communist regime while also creating an environment where other countries are beholden to them.
Enter state owned factories. Where there is no requirement for the factory to make an actual net profit, as the regime will give x amount per unit shipped. Make sure your countrymen must purchase the regime goods because import products cost too much. Production of the most units is the only thing that matters.
All this can be achieved via currency manipulation. Keep it low, the IP will flow in, and they will produce the purchase ordered number. After that they keep producing and those products flow out as counterfeits or extra numbers direct from factory etc. These products are exports. Stash that income overseas and never bring it back. The opponent country buys your garbage like mad, cause its cheap. Making its own produced products less attractive. Even better for domination. Maybe start funding pro-strong regulation organizations and fund groups that want more regulation in industry in the opponent country, even better.
The only thing we can do as American Manufacturers is one, never send your ip to those regimes, and don't have them produce any parts for you. This way you only get ripped off by small business style counterfeit guys. One thing I've thought of doing is creating some models with incorrect critical geometry. I get emails every week for these small counterfeit companies asking to quote parts. I manufacture everything in house so I don't care about them. But if I started sending drawings with incorrect shit, who knows they may start to counterfeit that stuff and it won't even work correctly. Fight fire with gasoline.