I just read some article on Gamerant that argues for Fallout 5 being set in China: I would probably not go into that territory. I would like to keep my Fallout world small and regional. I like how a story can play out in a minor part of the US and be totally disconnected from the rest of America. It's nice to have a world that is not "global" if you understand what I mean and where politics is regional. If you brought China into Fallout then the world would suddenly feel global again and be about big politics instead of the balance of power in a smaller, self-contained region.