The Northern Yan state is subject to…

The Northern Yan state is subject to incessant attacks by the neighboring rival Northern Wei, and becomes particularly true after Northern Wei annexes all of the territory of Xia in 431 and therefore no longer has a major western rival to deal with.

Emperor Taiwu of Northern Wei makes periodic attacks to pillage Northern Yan territory and then withdraws, draining Northern Yan of food supplies and other resources and weakening it.

While Feng Hong had been the Duke of Zhongshan, his wife had been Lady Wang, who bore him at least three sons, Feng Chong, Feng Lang, and Feng Miao.

However, in 431, Feng Hong, now emperor, creates Lady Murong his princess instead.