How do you say goodbye if you want to immigrate?

It depends on which country you immigrated to. When you go to America or Europe, you can say "teachers and classmates, I'm going to the western paradise", when you go to Africa, you can say "teachers and classmates, I'm going to emigrate to the most primitive mainland", and when you go to Japan, you can say "teachers and classmates, I'm going to keep company with the devil, goodbye forever".