Anything that cannot be solved should be blamed on ghosts.
People often worship ghosts and gods, because ghosts and gods are responsible for natural and man-made disasters.
In the east, there are the underworld, the folk world, the Buddhist world, and the Taoist world, where ghosts and spirits coexist; in the west, there are only hell, the human world, and heaven, collectively called "demons."
The conflict between the laws of the East and the West gave birth to "nightmares" - neither ghosts nor demons, but loopholes in the rules and paradoxes of existence.
In order to check and balance the supernatural, the East set up "evil-killing envoys" who feed vessels with blood, kill spirits with weapons, and kill ghosts with spirits.
They do not believe in gods and Buddhas, nor practice magic weapons. They only believe in:
"Ghosts can kill, and people can also kill. If I become a ghost, I will kill myself."
Concept: Oriental fantasy, the late national style is infinitely popular