According to legend, in ancient times, demons were rampant among the people, and the natural and man-made disasters that lasted for thousands of years were all caused by countless non-human demons in the world. Countless people changed their minds when they heard about demons. The word "evil demons" was on their lips every day. As a result, professions such as demon exorcists, fortune tellers, and protectors were born.
People in the world have different opinions on the origin of demons. Some say that demons are originally humans, and they entered the demon path by practicing some weird kung fu and becoming possessed. Some say that they absorbed the spiritual energy of heaven and earth and became spirits... There are different opinions, but very few people in this world know what the truth is.
In fact, the fox demon may not be called a fox demon, and the clam spirit may not be called a clam spirit...
Let me call them book demons.