https://fallout.fandom.com/wiki/Shi

Kind of already happened. It’s 90s levels of racism, but the crew of the Shi Huang Di crashed in San Fran after the war and used the nuclear reactor and AI computer from their sub to build a nation in the ruins. 200 years later they’re a high-tech powerhouse. They’re also a kinda racist “what if Shaw Brother’s Kung Fu movies were real and also plasma guns”?

But canonically, the Chinese just kind of shrugged at the nuclear war and immediately re-built a prosperous high-tech society while everyone else was fucking around eating geckos and throwing sharp sticks at each other.