Here's some of my favorite Chinese restaurants around here:
Classic Chinese Restaurant: tasty Cantonese dishes, only go for dinner though since their lunch menu is not as good
J Zhou Oriental Cuisine: also Cantonese food, dim sum for lunch menu and more traditional dish for dinner, a bit…
J Zhou Oriental Cuisine has the best Dim Sum in OC imo.
Alternatively, The RH Grill in Fashion Island has really good brunch on weekends and a nice view.