"History of the Six Realms" records: "
... Hundreds of millions of years ago, since the creation of Pangu, in the early days of the prehistoric period, the six realms were derived.
The so-called six realms are naturally composed of: humans, ghosts, immortals, demons, gods, and demons. A boundary is a boundary, and a gathering is a gathering. It is said that the human body gathers six dharmas, each with its own divisions, so it is called the gathering of six realms.
Although it is called the "Six Realms", it has been accumulated over a long period of time and has been invisibly divided into two parts. This is the world of gods, immortals, and humans headed by the gods, and the world of demons, monsters, and ghosts headed by the demons. These six realms have different purposes and conflict with each other. So they are often in conflict,
There is no peace in the world, and all life in the world is in ruins. …"
"Do you want to become an immortal?"
"Cultivation... Cultivation to immortality?"
"To worship me as your teacher, you must cultivate immortality."
"Then I will cultivate immortality."
"Then you know that it is a thousand times more difficult for monsters to cultivate immortality. If you are not careful, you will be wiped out."
The little hand holding the white robe shook, and then he squeezed hard: "I want to become an immortal!"