There are two plates, one big and one small. Generally, the small plate is the motherboard and the large plate is the bone plate. A hotel is a big one, a small one, two bowls and one dish. A small shop is usually a dish, a bowl and a teacup, but it is certain that a dish is a bone dish. Bones are used to hold garbage, fishbones, bones and things you don't want to eat. They are usually put on the saucer. The main course is used to eat vegetables.
Go to a slightly more formal restaurant, and the waiters in the stands will come to change dishes every once in a while or when they see that the plates are almost full. This is the bone plate.