If it is a suitcase, look at the decorations on the back wall to see if there are any paintings. There is also a window below the painting. The position of the window is definitely not the main position. Generally, there is a window. The location in the hall is on both sides of the main seat. Generally, there are no round tables. If there is one, look at which direction the main body is facing. There must be a stage. The one facing the main seat is the main seat.