Once upon a time, the God of Creation created five god-kings, the God of Law who is in charge of world order; the God of Life who is in charge of life and death; the God of Time who is in charge of history; the God of Destiny who is in charge of many destinies, and... The God of Wisdom who is above the four God-Kings and is in charge of all wisdom.
Under the control of the five gods, life, order, and wisdom gradually came into the world, and everything seemed extremely harmonious.
However, one day, the eldest sister of the five gods, the God of Wisdom, fell in love with a human. Unfortunately, for his own selfish purposes, the human loved her innocently and even killed her without knowing the identity of Wisdom.
From then on, humans and the gods no longer had anything to do with each other, and the gods also changed from legends to just legends.
After the death of the Creator God, the Four Gods, with their will of creation and wisdom, derived the Firmament Domain, inhabited by gods above humans and below the God King.
These gods... All seem to come from a place called Tianyuan