Emperor Wu of Northern Zhou
Gao Heng (; 570–577), often known in history as the Youzhu of Northern Qi (), was briefly an emperor of Northern Qi. In 577, Northern Qi was under a major attack by rival Northern Zhou. Gao Heng's father Gao Wei, then emperor, wanted to try to deflect ill omens that portended a change in imperial status. He and therefore passed the throne to Gao Heng. Later that year, after they fled in face of Northern Zhou forces' arrival, they were captured and taken to the Northern Zhou capital Chang'an. There in winter 577, Emperor Wu of Northern Zhou ordered them, as well as other members of the Gao clan, to commit suicide. Northern Qi territory was seized by Northern Zhou, although for several years Gao Wei's cousin Gao Shaoyi claimed the imperial title in exile, under Tujue's protection.