The human body is very fragile and sensitive to magnetic fields, airflow and temperature changes. Although these influences can't affect you in a painful or extreme way, they will do harm to your physical and mental health over time. The knowledge of house placement in geomantic omen is to solve the problems of magnetic field distribution, ground temperature, lighting and ventilation in houses, which is an architectural science accumulated by ancient people. The treatment of the yin house embodies the ancient concept of death, and also embodies the clan concept of the Chinese nation. For a long time, a whole set of theories has been formed. But these theories, like Dachuan Chinese medicine, are based on the "prescriptions" recorded by facts. Of course, there is no "scientific" truth. It is human nature to seek advantages and avoid disadvantages, so we can pay due attention to it and not be too superstitious.