Feng Lang and Feng Miao, believing that…

Feng Lang and Feng Miao, believing that Northern Yan is on the verge of destruction in early winter 433, and believing that Princess Murong is planning to have them killed, flee to Liaoxi (in modern Tangshan, Hebei), where Feng Hong had sent their older brother Feng Chong to be the commanding general.

They persuade Feng Chong to surrender to Northern Wei, and Feng Chong sends Feng Miao to Northern Wei to offer his allegiance.

Feng Hong, in response, sends his general Feng Yu to put Liaoxi under siege.

In spring 433, Emperor Taiwu sens his younger brother Tuoba Jian, the Prince of Yongchang, to relieve Liaoxi, and further creates Feng Chong the Prince of Liaoxi with a number of other honors, including ten prefectures as his fief, to try to encourage other defectors.

Tuoba Jian's forces soon surround Feng Yu and force his surrender, then withdraw with three thousand captive households.

Feng Chong now requests permission to go to Helong to persuade Feng Hong to surrender, but Emperor Taiwu does not grant his request.