Editing Northern Yan (section)

=== Decline and fall ===
Feng Ba became deathly ill in 430. Conflict arose between his Crown Prince, Feng Yi (馮翼) and favourite concubine, Consort Song (宋夫人), who wanted her own son to inherit the throne. The situation soon leaked to Feng Ba's brother, the Prime Minister [[Feng Hong]], who led his troops and took over the capital. Feng Ba died soon after, and Feng Hong took the throne for himself, slaughtering all of Feng Ba's sons including Feng Yi. 

At the time, the Wei had dealt with the Hu Xia threat in the west and began focusing on conquering Northern Yan. From 432 onwards, Yan faced periodic attacks from Wei. In 433, a succession issue led to Feng Hong's sons handing over [[Liaoxi Commandery]] to Wei. Feng Hong refused to surrender and attempted to secure his position by allying with the [[Liu Song dynasty]], even becoming a vassal to them in 435, but Wei continued their assault nonetheless. Finally, a major Wei invasion in 436 prompted Feng Hong to flee to Goguryeo for protection, ending the Northern Yan.

Feng Hong remained in Goguryeo until 438. While the Goguryeo king, [[Jangsu of Goguryeo|Jangsu]] initially refused to hand him over to Wei, Feng Hong repeatedly offended him and tried to escape to Liu Song, resulting in Jangsu executing him and his sons. In Northern Wei, Feng Ba's granddaughter grew to become [[Empress Dowager Feng]], an important figure in Wei's history. In 1965, the tomb of Feng Sufu was discovered in [[Beipiao]], [[Liaoning]], which contained the earliest extant of the double [[stirrup]] along with a unique duck-shaped [[glassware]].<gallery class="center" widths="180" heights="180">
File:鎏金木芯马镫06337.jpg|The earliest extant double stirrup.
File:Northern Yan duck-shaped glass.jpg|Duck-shaped glassware.
</gallery>