In the winter of the sixteenth year of Zhenguan, the modern otaku Yang Zhou crossed over to become the prince of the Tang Dynasty, Li Chengqian. How to change history with the knowledge of later generations, and walk out a road of emperor who wins the hearts of the people and wins the world. The powerful crown prince Li Chengqian with modern ideas and technology VS the overbearing and ruthless emperor Li Shimin. Li Chengqian: Ten thousand years is too long, only Fighting for the day and night, for the eternal prosperity of the Tang Empire, the lonely king wants to reform. Li Shimin: I led the army at the age of sixteen, killed my brother and imprisoned my father. I am still alive, and you want to be in charge? Li Chengqian: To be an emperor, you need to understand The way of the contradiction between yin and yang changes. Li Shimin: Wei Zheng is dead, you want to take over, and complete the great cause of the pissed off Lao Tzu? ... ... ...