How to apply for a US green card to live in the UK? What is the procedure?

It mainly depends on your own situation and the needs of specific countries. Every country has different policies. First of all, your application in the United States (whether permanent residence or nationality) is not much different from your application in China. Britain belongs to the European Union and can apply in several different ways.

You can apply for permanent residence if you formally go through domestic channels in the UK, such as investment immigration, work visa and starting a business.

Curved path: Take the third EU country as a springboard to immigrate first, and after obtaining the permanent residency in the host country, settle in the UK as a permanent member of the EU (no job, only life). So you can apply for his permanent residence after living in Britain for several years.