The history of Chinese cuisine is marked by both variety and change. The archaeologist and scholar K.C. Chang says “Chinese people are especially preoccupied with food” and “food is at the center of, or at least it accompanies or symbolizes, many social interactions.” Over the course of history, he says, "continuity vastly outweighs change." He explains basic organizing principles which go back to earliest times and give a continuity to the food tradition, principally that a normal meal is made up of fan() (grains and other starches) and cai() (vegetable or meat dishes).