Explain what "evil spirits" are. Generally speaking, "evil" is a deficiency in a person's living environment, just like a "disease" when a person is sick. People are sick, some can heal themselves, and if they can't, they have to go to the hospital to find a doctor. If "evil spirits" are committed in the living environment, if they have adverse effects on life, they can be resolved under the guidance of Feng Shui masters.