I Don't Want to Be a Decent Person

Li Changsheng was sent to the Kunlun Mountains when he was a child and was adopted by an old man. When he was eighteen years old, the old man let Li Changsheng come down from the mountain as agreed. Who is the old man? Why are you trapped in Kunlun? Why did he take in the son of his former enemy and raise him for eighteen years? Li Changsheng, like a young tiger descending from the mountain, is bound to become the biggest villain in the world!