Daily advice for HK immigrants to the West:
Start making your Linkedin profile NOW if you haven't. If you haven't updated your resume or CV, DO IT! Do it before you leave, unless you're ready to do menial jobs OR to retire with substantial amount of wealth. Recruiters from the West look at Linkedin. Put your best professional profile photo up to give off the professional image you want. Door knocking will probably do you no good. We live in a different era now. Here's a link provided by Linkedin to help you polish your work to attract attention of company recruiters.