At the beginning of the creation of the world, the sky collapsed and the earth collapsed. In the chaos, all the gods did not notice that a trace of earth spirit slipped out of their control... The earth spirit slowly grew stronger by devouring people's minds. When the gods discovered it, the tiny trace of earthly soul was now enough to fight against the powerful heavenly soul.
The earthly spirit attached itself to the human body again and again, and the heavenly spirit kept looking for him.
Because the earth spirit can make people see things that are originally invisible, people also call them yin and yang eyes...
Intention: Raise your head, there will always be light