Li Sujie (李素節) (646 CE[1] – c.691 CE[2]), formally the Prince of Xu (許王), was an imperial prince of the Chinese Tang dynasty. He was the fourth son of Emperor Gaozong, born of his one-time favorite Pure Consort Xiao. After Consort Xiao and Emperor Gaozong's wife Empress Wang were deposed and executed due to the machinations of Emperor Gaozong's second wife Empress Wu (later known as Wu Zetian), Li Sujie was under the watchful eyes of Empress Wu, and was several times demoted on false accusations of misbehavior, In particular, as Emperor Gaozong's health deteriorated and government affairs fell to Empress Wu, Li's grief increased. During the Tianshou era, with Wu finally establishing her own dynasty, she continued to massacre Tang imperial clan members as she perceived them as threats, and she summoned Li Sujie and his older brother Li Shangjin (李上金) to the then-capital Luoyang. When they arrived near Luoyang, Empress Dowager Wu had him strangled, while Li Shangjin committed suicide.