In the year 675, the Empress of Tang Gao Zong appointed Li Xian who was 22 years old as the crown prince, Li Xian was good at learning, and he had the talent on the things of government. But Wu Zetian was trying to succeed in throne, so she was harsh to Li Xian very much. One time, Li Xian broke the rule, Gaozong wanna forgive him, but Wu Zetian said that we should place righteousness above family loyalty, so the prince Li Xian was demoted into Taiping mountain as civilian. Then he was persuaded to suicide. Lixian was died at the age of 31 years old. After the death of queen, he was bestowed on Prince Zhanghuai.