Taizong Died in 649, and 20 year old Li Zhi took the throne. He ruled as Gaozong. Unfortunately, the young man suffered from frequent attacks of dizziness, which made it difficult for him to function normally. In addition to his fragile health, he had a week character and was easily manipulated by other people. And he had no talent at all for running an empire. His reign did not look at all promising. One wonders why Taizong selected him among his other eligible sons.