Samsung doesn't have any OLED manufacturing in China and never agreed to such terms before. In this particular case, we aren't just talking about Chinese companies poaching Samsung's former/retired engineers or shamelessly copying their IP. The Korean authorities in a sting operation stopped a bunch of Samsung suppliers from smuggling Samsung's advanced OLED manufacturing machineries to some unnamed Chinese company (wink wink you know who) in China at the port of departure in South Korea.
Yes. Because of those pesky things called "laws" and "trade agreements". It's still theft even if it wasn't always difficult to do.
Yard ornaments might be easy to steal, I mean, heck, people just leave them in their front yard over night. But it's still theft, it's still illegal, and even though the people made it easy there should still be a penalty for the theft.
Not saying I agree with said theft, but when making deals with known questionable actors, it's a bit of a given.
But in this particular case with Samsung's OLED, Chinese companies are not only accused of poaching their former/retired employees or stealing (or learning) know-how's or IP, but also smuggling their high-tech manufacturing machinaries out of Samsung suppliers' plants in South Korea to China outright.