20 people sit in a big box banquet, and you can order according to your taste. For 20 people, it is enough to order 18 dishes, and two soups, usually eight cold dishes and 12 hot dishes. Pay attention when ordering, go to the store and look back at the menu (some menus are double-sided) to see which dishes occupy the most space, which dishes are hard and which dishes are in season.

Or ask the waiter, what is the main dish in the store, what are the signature dishes and recommended dishes (generally these two dishes are not very bad), and be familiar with the name, raw materials, origin and efficacy of each specialty dish.

Other knowledge of ordering food.

Vegetarian dishes must be evenly matched, because they are all vegetarian dishes and are easy to get bored, so the proportion of vegetarian dishes should not be less than a quarter. The combination of heavy taste and light taste is appropriate. Don't order only one animal in meat dishes, such as chicken, duck, fish, etc. If you want to drink, you have to have appetizers. At this time, the taste of the food should be a little more partial, which is better, and you can order more meat dishes.

A qualified person who orders food must ask in advance what taboos the other person has, such as people who are allergic to parsley, pork, fish, chopped green onion, sauerkraut and seafood.