In 574, Yuwen Xian's title was changed to Prince of Qi.
He also changed Zhang's princely title to Prince of Qi.
He posthumously honored Li Tan as the Prince of Qi.
At some point, Wang Zongbi's title was further upgraded to Prince of Qi.
In 548, Emperor Wen created him the Prince of Qi.
In 835, Li Cou died, and was posthumously created the Prince of Qi.
Just two months later, Gao Yang's title was changed to Prince of Qi.
He was instated as Prince of Qi in 235.
Cao's life was spared and he was demoted to his previous title of Prince of Qi.
Two months later, his title was made the even greater title of Prince of Qi.