Buffet, sometimes called buffet dinner, is an informal western-style banquet, which is widely used all over the world, especially in large-scale business activities. The specific way is that diners don't prepare dinner, but choose their own food and drinks during meals, and then stand or sit and dine freely with others or alone. Buffet is called buffet mainly because it can arouse the subjective initiative of diners, who can help themselves and arrange and choose dishes within a given range. As for it, it is also called a cold dinner party, mainly because the food it provides is mainly cold food.