Feng Hong (; died 438), courtesy name Wentong (文通), formally Emperor Zhaocheng of (Northern) Yan ((北)燕昭成帝), was the last monarch of the Chinese Northern Yan dynasty. 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 name. During Gao Yun's reign It is not known when Feng Hong was born, but it is known that he was Feng Ba's younger brother. There was no historical record about him until 407, after his brother Feng Ba (along with another brother, Feng Sufu (馮素弗), as long as others) had overthrown the tyrannical Later Yan emperor Murong Xi and made Murong Xi's adoptive nephew Murong Yun emperor. (Murong Yun, who soon changed his name back to the original Gao Yun, is regarded by some as the last emperor of Later Yan and by some as the first emperor of Northern Yan.) Late in 407, Gao Yun commissioned Feng Hong as a major general. Probably also at the same time (but definitely during Gao Yun's reign), Feng Hong was created the Duke of Ji. After Gao Yun was assassinated by his attendants Li Ban (離班) and Tao Ren (桃仁) in 409, the officials of the regime supported Feng Ba as the new emperor. Feng Ba, when he took the throne, gave a promotion to Feng Hong, but continued to let him carry the title of Duke of Ji. During Feng Ba's reign In 410, Feng Ba's cousin Feng Wani (馮萬泥) and another cousin's son Feng Ruchen (馮乳陳) both felt that they contributed much to Feng Ba's success, and therefore were resentful that they were not at Longcheng and in control of the imperial government but were required to serve as commanding generals at the cities of Feiru (肥如, in modern Qinhuangdao, Hebei) and Bailang (白狼, in modern Zhaoyang, Liaoning). They therefore rose in rebellion together. Feng Ba sent Feng Hong and Zhang Xing to attack them, and after