The dining room has a beam ceiling: a ring with a diameter of about 1.0- 1.2m and a width of 10cm, made of wood and gypsum board. The upper light band and the inner light band are made separately, and then the two sides of the beam are made into a complete ring, which can be large and small according to the situation, but it must look like a complete ring, and the lower end of the ring is flush with the lower end of the beam. The middle of the ring should be connected to the beam with a bracket, and the upper part of the ring can be lifted with a bracket or thin steel wire;