1. Demons: In addition to humans, living animals and plants are cultivated into spirits, such as fox demons, tree demons, flower demons, etc.
Take Sun Wukong in the classic novel "Journey to the West" as an example. Sun Wukong was originally transformed from a stone and can be called a "spirit"; and because monkeys practice Taoism, after learning 72 transformations and mastering a certain amount of magic power, they are not recognized by the heaven, so they can be called "demon"
2. Demon: Demon arises from the heart and is related to people. People who are obsessed with a certain aspect are called demons.
The devil has been a millstone since ancient times. Emperor Wu of Liang changed the stone into a ghost. The abbreviation of "Mara", Buddhism refers to all psychological activities that disturb the body and mind, undermine good deeds, and hinder spiritual practice as "demons". Demons have at least two basic characteristics: high magic power and harm to humans. Only if these two conditions are met can one be called a devil.
3. Ghost: Dead people become ghosts, living people become humans, and dead people become ghosts.
It is the life soul among the three souls after death. Ghosts are the most yin things, commonly known as ghosts. After the body dies, only the non-entity image remains. Ghosts are pure yin bodies in Taoist records, so they have some superpowers, but they are extremely weak and cannot even be called magic.
4. Strange: Inanimate objects become spirits and become monsters, such as a table becoming spirit, such as a stone becoming spirit, etc.
The original meaning of "kai" is not an independent category among monsters. "Kai" emphasizes strangeness and strangeness. It is usually combined with "yao" and is mainly used to describe the monster's very strange appearance. Later, due to the gradual derivation of a real type of monster.
Extended information:
What is enshrined by others and needs incense in the world is God. Therefore, the imperial power can consecrate gods, because in ancient times, it was illegal to worship wild gods in temples called obscene temples, and only officially recognized ones could be worshiped. However, those who were enshrined by believers' incense could become gods even if they were not gods.
Those who practice self-cultivation and attain enlightenment are called immortals. After becoming an immortal, being seen by the people, enshrined and entered into the Taoist system, they are called gods. If they are not enshrined, they are called loose immortals.
Jing generally refers to plants that have gained magical power through practice and can transform into human nature. They are not very harmful to people, and in general story descriptions, they are all kind-hearted existences. It will help mankind a lot.
The spirit generally refers to the life that absorbs the essence of the sun and the moon, thereby forming self-awareness and existing. This generally occurs relatively rarely. So we can see that the difference between demons, ghosts and monsters lies in whether they are created by living or inanimate cultivation. These are probably the differences.