Feng Shui depends on which evil spirits should be avoided

There are two types of evil spirits: tangible and intangible. ?

Tangible objects refer to certain objects that we can see, such as buildings, telephone poles, lamp posts, bridges, etc. ?

Intangible evil refers to certain phenomena that we cannot see, but can taste and feel, such as strong light, noise exceeding a certain decibel, and unpleasant smells. ?

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