Pangu created the world and died of exhaustion. The body turns into all things, and the soul turns into the ancient gods (Nuwa, Fuxi, Haotian, etc.). Its skull/resentment turned into a ferocious beast, becoming the source of disaster and destruction, and opposing the gods who protect the world. The eternal confrontation between Pangu's good thoughts (protection, represented by: Pangu tribe, the human race created by Nuwa) and evil thoughts (destruction, represented by: Jian and its derived zombies).