4 ideas
A proper Chinese meal is built from two parts: fan (grain or starch, like rice, millet or noodles) and cai (cooked dishes of vegetables and meat). Grain is the base that fills you, and cai makes the grain go down. Their balance, not any single dish, determines whether something counts as a meal, and the rule shapes everything from how dishes are cut to how much variety is needed.
In the Song dynasty, food became a self-conscious cuisine rather than just regional cooking. This needed three things together: large commercial cities like Kaifeng and Hangzhou, trade that brought ingredients from many regions, and a class of diners who chose dishes on taste rather than ritual or habit. Restaurants, named regional styles and food writing appeared together once those conditions converged.
In southern Chinese folk practice, foods are classed as heating, cooling or neutral according to their supposed effect on the body, not their actual temperature. Illness is read as an imbalance, and people correct it by changing their diet, so every meal doubles as a health intervention. This makes food choice a running act of self-regulation handled by ordinary households, not doctors.
Early China treated food as a central organizing system. Most ritual bronzes were vessels for cooking and serving food and wine, the cook Yi Yin was said to have become a chief minister, and good rule was compared to blending a soup whose flavors balance one another. Reading politics and ritual through the kitchen shows that harmony was imagined as balancing different ingredients, not making them all the same.