2. Five spices usually refer to the five main spices used in cooking food, such as fennel, pepper, star anise, cinnamon and clove, that is, mangxiang condiments, which have the function of making foods with fishy smell, foul smell and unpleasant smell have no peculiar smell, and then make them fragrant. The smell of food stimulates people's sense of smell. Those who smell it increase their appetite, while those who smell it decrease their appetite. Although there are some foods like stinky tofu, they smell stinky and are popular, but it is always better to smell delicious.