"If I visit London as a tourist and stay there, can I find work and have a lawyer organise my documents so I can stay as a citizen for the rest of my life?" Sounds like a plan, but you need to do a lot of research and preparation if you are serious about this. Do some research about visa requirements, permanent residency and British citizenship. If you just visit London and expect it all to happen by magic after you arrive, you will be very disappointed.

maybe u could come to China,All Chinese will be friendly to u.