For different chinese occasion there are certain dishes that are made. These are some of the most popular foods eaten for the following occasions.
Harvest Moon - Moon cakes
Dragon Boat Festival - Rice Tamales (Joong)
Chinese New Years - Vegetarian dish (Ji), Chicken, salted fish. Many foods and symbolism related to Chinese New Years.
Marriage - Rice Cakes, Chicken. Also, another food occasion with different dishes that have different symbolism.
Baby's 1 Month Old Party - Red Egg and Ginger
Woman that just gave birth - a soup made from black vinegar, pig's feet, ginger and hard boiled eggs (to help the mother recover)
Birthday - chicken.