Li Chengan, who was originally a high school student, took a nap in a history class. When he opened his eyes again, he became the second son of Emperor Taizong of the Tang Dynasty who was not completely consistent with the real world. At the critical moment of the Xuanwu Gate incident, he helped his father to save his life, but later he had doubts. Afraid that his brother Li Chengqian would kill him because of the throne, he left the palace and traveled abroad. Using modern knowledge, he traveled around the world, but accidentally entered the realm of Shiwanda Mountain and Twelve Cave. There, he used modern knowledge to benefit the Miao people, and thus learned some witchcraft and some medical skills, and started At first, he traveled around to practice medicine and save people, but fell into a valley while collecting medicine, and accidentally entered the Immortal Cave. He learned the skills of the school captain and returned to the Tang Dynasty. To prepare for the revival of the Tang Dynasty, he was responsible for leading three bad men to follow the emperor Li Xingyun silently and secretly protect Li Xingyun's safety. In the middle, he had a dispute with Yuan Tiangang because of the way of heaven and the overbearing decision. The two broke up unhappy. From then on, he joined forces with Li Xingyun to follow the way of heaven, rule by inaction, and govern the country for the people.
What the hell?