When Pangu created the world, there were many gods in the wild. These gods are very powerful and have a long life span, almost like heaven and earth. Originally, these gods had no desire, but the Emperor of Heaven chose to defeat other gods slowly, thus establishing the heaven and becoming the master of it.
After the establishment of heaven, the Emperor of Heaven formulated a particularly strict hierarchy to restrain other gods in the wild. Originally, the gods in the wild land had no desire, and they couldn't stand such strict commandments and rules, so the gods represented by Xingtian began to attack the Emperor of Heaven, but ended in failure, and Xingtian himself was killed.
Everyone will be familiar with the story of the goddess mending the sky, and the reason why Nu Wa mended the sky is because the war between the two gods of fire and water almost completely collapsed the heaven. In that war, the Emperor of Heaven also died, and many ancient gods died together. The remaining great gods chose a new master, the Jade Emperor now. However, due to both losses after the war, there are not many immortals left in the sky. Therefore, the Jade Emperor chose the way of summoning mortals to become immortals from the mortal world, that is, the battle of sealing gods in the last years of Shang Dynasty. Although these people are called gods, they are actually immortals from cultivation.
The world created by Nu Wa is naturally under the jurisdiction of the Emperor of Heaven. Although there is an emperor's management on the earth, the emperor is also under the management of the jade emperor. There is a soul after death, so the place where the soul goes is the so-called hades, where there is a special hades to manage.
In heaven, many immortals will fall into the underworld for various reasons, or seek freedom, or be controlled by demons, and so on. In the underworld, there are not as many constraints and requirements as heaven, and you can do whatever you want. Of course, such a big venue must be managed by someone, and the owner of the underworld is asura King.
The last one is the underworld. The devil can be cultivated by everything in the world, so its scope is not extensive and there is no unified management. Just like a piece of loose sand, only monsters with very strong abilities can survive in the world.