Deposed, demoted, and died miserably? Li Chengqian said that he would not eat this three-hit combo. A man from science and engineering in the 21st century traveled to the Tang Dynasty and became Taizong's eldest son Li Chengqian. He felt that since he could not be the prince or the emperor, Then it would be cool to just be a naughty kid who teases officials and hugs their sisters' long legs.