褚遂良
In 649, Emperor Taizong died while at the summer palace Cuiwei Palace (), after entrusting Li Zhi to Zhangsun Wuji and Chu Suiliang. Under Zhangsun's suggestion, Emperor Taizong's death was kept secret, as Li Zhi escorted Emperor Taizong's casket back to Chang'an. Once that happened, three key members of Li Zhi's staff—Yu Zhining, Zhang Xingcheng, and Gao Jifu—were promoted to chancellor posts, before Emperor Taizong's death was announced. Li Zhi took the throne as Emperor Gaozong. (In Yu's case, he was promoted to be "Shizhong" (), the head of the examination bureau of government, a post considered one for a chancellor.)