The two best local chinese places are Full Ho (corner of Jones and the Expressway) and Sam Woo BBQ (Spring Mountain Road).
Full Ho is a tiny neighborhood place with about 12 tables. Great food, low prices, and the woman who runs the place is hysterical. She does everything and runs around like a maniac, but if you have a chance to talk to her, she will have you it stitches. It gets busy, but it is awesome.
Sam Woo BBQ is in the Chinatown Shopping Center on Spring Mountain. If you want an authentic NY or SF Chinatown experience, this is it. Ducks and ribs hanging in the showcase, great simple food with huge portions. You will not leave hungry. Kind of frenzied just like Chinatown, but if it's good food you want, this is the place to go.