What does "evil spirit" in Feng Shui mean?

Evil spirit is a kind of bad aura, mainly including: 1. Form evil: it is visible and traceable evil, such as chicken-mouth evil, reverse bow evil, and heart-piercing evil; Crossroads, overpasses, strange-shaped rocks, trees, roads, etc. outside the house. 2. Smell evil: moldy or any unpleasant smell is smell evil; 3. Light evil: insufficient light or too strong light in the house will have adverse effects, and neon lights outside the house are also a kind of light evil; 4. Sound evil : noisy, unpleasant sound of running water; 5. Reason evil: evil that regulates qi, such as two and five superlatives of flying stars, three and seven appearing at the same time, etc.; also such as odd and even numbers of light bulbs, number of fish, etc.; 6. Color evil : Too much black in the home means excessive Yin energy, and too much red means mental stress. In addition, the colors of door to door also have a mutually reinforcing and mutually restraining relationship. More importantly, it must be matched with the color required by the homeowner. 7. Magnetic evil: Because magnetism has a great influence on the human brain, Feng Shui mainly calculates the good or bad luck for people based on changes in the magnetic field.