There are, sadly, so few scenes in (relatively) modern cinema, in which white people prove that they black, by suddenly becoming Asian. Here is one of those scenes.
Navin is an idiot. He grew up in Mississippi as the adopted son of a black family, but on his 18th birthday he feels he wants to discover the rest of the world and sets out for St. Louis. There everyone exploits his naivete, until a simple invention brings him a fortune.