長孫無忌
Empress Wang was sonless, and Liu suggested to her that she should request that Emperor Gaozong's oldest son, Li Zhong, whose mother Consort Liu was of low birth, be created crown prince, so that Li Zhong would be grateful to her. Empress Wang did so, and Emperor Gaozong agreed, after Liu Shi lobbied his fellow chancellors, including Emperor Gaozong's powerful uncle Zhangsun Wuji. Later in 652, Emperor Gaozong created Li Zhong crown prince.