2. Secondly, when designing the ceiling, we should avoid using mirrors as decoration. Installing mirrors on the ceiling is a taboo in geomantic omen. Because the scenery reflected by the mirror will be consistent with the floor, the situation of "heaven and earth are not open" will be formed, which will affect the fortune of the owner of the study. At the same time, we should also avoid using three-dimensional frames, otherwise it will lead to the "top of the beam" in the study, and the radiation energy of the beam will be "depressed", which will easily cause mental stress and bring bad luck to people under the beam. Again, Yi Anzhu Feng Shui reminds everyone that when designing the ceiling of the study, the groove in the middle of the ceiling forms a "Tianchi" that gathers water.