The Demonic Reform of the Tang Dynasty Started with Training the Prince

[Datang + Time Travel + Dandy's Counterattack + Development] Fang Jun traveled back in time to the Zhenguan period of the Tang Dynasty and became the last love of Fang Jun, the second son of Prime Minister Fang Xuanling. It's okay to have a lost love after traveling through time. What's even more unfortunate is that he also inexplicably fell in love with Prince Qianniu, and from then on he became a grasshopper on a rope with Prince Li Chengqian. In order to prevent Li Chengqian from revolting in the future and implicate himself, Fang Jun decided to slowly train the 17-year-old Crown Prince to become a different Li Chengqian from the one in history. Under Fang Jun's operation, a different prosperous age of the Tang Dynasty was also created.