Rebirth of the Urban Madman

What is Jiuyou, what is the fantasy world! What a fairy, what a devil! What is yin and what is yang! A generation of demon emperor Li Feng was reborn in a completely unfamiliar world. He was surprised at the beginning, then slowly integrated into it. On the edge of life and death, he finally understood the way of the Nine Nether Fantasy World, and then entered another world that he had never thought of. Others cultivate immortality, while he cultivates demons. Who said that one foot is higher than the other's? He wants to become a complete madman in the new world.