1, not suitable for hanging the bedside to avoid pressure; 2, it is not suitable to hang on the opposite side of the bed, cold (warm) air will hedge over, which is like the "natural barrier" of the house, and the airflow is a bad omen; 3. It is not suitable to cut vertically with the bed, especially tangential to the head or chest and abdomen; 4, should not be too low or too high, about 30 cm above the head is appropriate; 5. The best posture is perpendicular to the bed, not perpendicular to the bed. (provided by Guangzhou Yipin Fengshui)