China's geomantic omen is extensive and profound, which is not well understood by most people, but it is also reasonable from a scientific point of view. Fish, shrimp, crabs and turtles are all creatures that need water. The long-term humidity in the dormitory is too high, and indoor microorganisms, bacteria and mites breed rapidly, which easily affects people's skin and respiratory system. Moisture has a similar effect on human bones, especially during deep sleep, muscles and bones will relax accordingly, and long-term wet and cold will lead to an increase in the incidence of arthritis.