Yeah, it’s about as likely to work as claiming to be a sovereign citizen and attempting to “travel” through a military base with weapons.

Why would they? Car manufacturers have sued Chinese state companies for producing identical rip-offs and Chinese courts invariably rule that they look nothing alike whatsoever. Suing China for blocking you is not only going to have 0% chance of success, it also carries a decent chance of being told that you’re not blocked at all and it must be your problem.

They can probably try, but much like this case, it’s very unlikely it will get anywhere.