When all things were first created, Nuwa created humans and thought about what to do if these divine creations continued until they formed a system and eventually harmed the world.
So there is birth, old age, illness, death, and reincarnation.
The kind-hearted people who have not committed great evil will come to the world again in reincarnation, and the extremely evil people will not end well in the eighteen levels of purgatory in the human world.
It has been like this for hundreds of years, until the World War II between gods and demons, the evil ghosts were released from prison and wandered the world.
The God Emperor sent a God Lord to guard and suppress the situation.
As a result, the god turned around and the evil ghost turned around and stabbed through the heaven.
God Emperor:? Forget it, the mentally immature (treasonous son) will go to the human world to hone in for a few years (climb!!)
Intention: Birth, old age, illness and death are human nature