In feng shui, besides the meticulous study of “dragon (mountain range), sand (mountain range), cave (infrastructure site selection), and water (rivers, air vents, roads)”, the influence of universe time and space such as sun, moon, and stars on humans is also not highly valued. Special emphasis is placed on the auspicious stars, the true dragon, the beautiful sand, the beautiful cave, and the beautiful water, as well as the harmonious combination of yin and yang in the architectural layout. In “He Zhizhang”, it is said: “When a young man dies, the front is also a pond, and the back is also a pond; when a young man dies, the corpse mountain is lined up in front; when a young man dies, he is disabled, only because the water carries the yellow spring; when there are few people in his house, there are dragons at the back but no qi.” The purpose of feng shui theory is to explore nature, use and transform it in a restrained manner, select and create the best architectural environment (including the external environment) that suits people’s physical and mental health and behavioral needs, so as to achieve a state of goodness that combines yin and yang, heaven and man, and body and mind. This examination of the function of feng shui in disease prevention and treatment has a certain scientific significance.
There are often inexplicable phenomena in daily life, such as frequent traffic accidents occurring in a certain location with good road conditions at the scene; At some point in the late night, children are prone to crying; A fever patient who cannot find the cause naturally subsides when they move house; After the square building is transformed into a circular shape, the owner’s physical and mental well-being is improved, and so on. From the perspective of feng shui theory, all belong to “feng shui problems”. At present, there is an emerging edge science that lies between medicine, geography, and environmental science. It mainly studies the impact of the natural environment on human health in cinemas and theaters, and also involves the study of “harmful diseases” with regional characteristics, known as “medical geography”. Medical geography was first developed due to the investigation and research of certain diseases with regional characteristics. For example, diseases such as Keshan disease, Kashin Beck disease, and endemic goiter are closely related to geographical environment. Only by identifying the cause can the disease be effectively controlled to achieve the goal of disease prevention and treatment. Now, the research of medical geography has expanded, mainly including several branch research fields such as disease geography, health geography, environmental medicine, and medical geographic mapping. In fact, our ancestors began researching medical geography thousands of years ago, which is feng shui. Feng Shui not only studies the prevention and treatment of diseases in the geographical environment, but also further delves into the prevention and treatment of diseases in the geographical environment within buildings.