Li Hong
In late 655, Xu also proposed that the crown prince, Li Zhong (born of Consort Liu, who was of low birth, and therefore proposed as crown prince by Empress Wang (who was herself sonless) in 652 as she hoped that he would be grateful), be deposed and replaced with Empress Wu's eldest son, Li Hong. In 656, Emperor Gaozong agreed and demoted Li Zhong to the title of Prince of Liang, creating Li Hong crown prince instead.