Earlier quoted context omitted.
First and foremost, every country looks out for themselves, and who can fault one for doing that? All this shows is that the US isn't the only country that has asymmetric foreign policies and treaties. The "me no like China" chest-thumping is purely based on emotions, unless someone has actually found an actual backdoor in the 5g chips that are being considered for purchase here.
Actually no country does that. From Africian to American to Antarctican to Asian.. no one demands ip, shuts out all foreign companies, demands to be partners and than kicks you using some version of a legal system.
That is just a simplistic caricature of what actually happens. Any company has to first accept the tax breaks and business incentives (land resources, loans, no red-tape, easier access to market etc) that the Chinese government employs to attract foreign businesses in specific markets. China has structured those incentives to benefit them - which include setting up a joint venture with a Chinese company. If the company is a state owned enterprise, your benefits might increase even further. You have to obviously transfer the IP for the factory to actually make the thing you want. China, with its communist past has their own understanding of property rights. I believe even its citizens cannot own land - everything belongs to the government. I'm not an IP law expert, so I don't know what international laws China is or isn't violating, but I don't expect China to respect US laws, without a treaty.