The Legend of the Dragon in the Tang Dynasty

One thought becomes a saint, one thought becomes a devil. In this Tang Dynasty where demons were rampant, the four sects of Buddhism, Taoism, Martialism and Confucianism were evenly matched with the demons and could not suppress them forever. An 18-year-old boy came with the destiny to stir up the situation of the Tang Dynasty. He also shouldered the mission of finding the dragon vein of the Tang Dynasty and calming the world. This book is also called "I Killed Demons and Became the Hidden Demon Lord"