Northern Yan
Feng Hong (; died 438), courtesy name Wentong (文通), formally Emperor Zhaocheng of (Northern) Yan ((北)燕昭成帝), was the last emperor of the Chinese state Northern Yan. He seized the throne in 430 when his brother Feng Ba (Emperor Wencheng) was ill, and he used the title "Heavenly Prince" ("Tian Wang"). During his reign, Northern Yan grew increasingly smaller and weaker in light of repeated attacks by rival Northern Wei, and in 436 he evacuated his state and fled to Goguryeo, ending Northern Yan. Once in Goguryeo, however, he assumed the role of Goguryeo's suzerain (a status he had claimed earlier). King Jangsu of Goguryeo, unable to stand Feng Hong's antics, killed him in 438 although, curiously, he gave Feng Hong a posthumous imperial name.