Advice for immigrating to either China or Vietnam from the UK?

At this point I have fully resigned myself to the fact that Farage is going to win the election in 2029 and am making plans to leave the UK for the foreseeable future. My top choices are China, Vietnam, or Cuba.

I have a Bachelor’s degree and am able to work so this shouldn’t be an issue on my end, and I’m moreso interested in any experience/ideas on what life is like for an immigrant in any of these countries and anything else I should be aware of, possibly even city/area recommendations.