It should start by displaying some quote or other, by some local politician or other, to the effect that foreigners are a “problem.” (Our kids don’t speak Chinese well enough and are confused about their identity, etc.)
The central conceit of the movie could be that sometime awhile back, some of us started actually believing this ourselves, and founded a 12-step group. Maybe there could be (hovering in the background) a portrait of the founder (the "Bill W. analogue) who would be a white guy wearing a Mandarin collar and skullcap, Confucius clothes, something like that.
So now the challenge becomes, what funny things can we do to show how much we’ve assimilated? (Or failed to assimilate?) For instance, the ladies could giggle with their hands over their mouths, fan themselves with paper fans, etc.
Maybe the “newbie” could try to derail everybody by bringing McDonalds food to the meeting, only to see the others slice up the Big Mac, put everything in the middle of the table, and eat little bites using chopsticks.
I have an idea which would be a bit more trouble, but still feasible, I think. Go around to places where there are large groups of different types of foreigners (the mosque? a construction site? some buxiban?) and get each group to sing one or two lines of a song which one of us would have to compose. (I’m thinking of something like that Taiwanese TV beer commercial.) Then splice them together, and we’ve got a catchy…something.
Heh, maybe this could be one of those public-service messages they play before the movies, like “wear condoms” and “don’t beat your wife.”
Another “opening credit” idea would be…well, I keep picturing my six-year-old little friend squeezing a fifty-year-old friend’s big bulbous nose, in a spirit of awe and wonder.