After the Battle of Xuyi, 654.38+ 10,000 cavalry in the Northern Wei Dynasty were able to attack the Yangtze River, but they couldn't beat Huainan, a small town, mainly because of their mistakes in decision-making. At that time, Wu Tai in the Northern Wei Dynasty had unified most of the northern regions. The Northern Wei Emperor Taiwu was also an emperor who was very good at cavalry fighting. He personally led the cavalry into western Gansu, Mobei. At that time, he dominated the party and laid down a city that claimed to be immortal.

As an ambitious monarch, Taizu felt that the opportunity to destroy the South Courtyard was just around the corner, but because of the lessons from the past, Taizu of the Northern Wei Dynasty dared not send troops rashly. However, after the third Northern Expedition in the Southern Dynasties, Emperor Wu Tai of the Northern Wei Dynasty saw the exhaustion of Song Jun's military power and made up his mind to go south.

Hebei is far away from Jiangnan, and there are countless cities inside. This kind of long-term fighting is undoubtedly very inappropriate for the cavalry in the Northern Wei Dynasty, so the Northern Wei Emperor Taiwu formulated a strategy of quick assault. At that time, the Xuyi generation belonged to a peaceful area, and the nearby commanders thought that this place could be a place that did not need much attention. However, the commanders and fighters at that time thought that Xuyi was located in the north and south, so they vigorously repaired the city defense facilities. At that time, the court underestimated the enemy and thought it was a very dangerous area.

It was also because of his preparation in advance that Wu Tai, the emperor of the Northern Wei Dynasty, could not cross the Yangtze River in a short time and was forced to return to the north with his army. The reason why the Northern Wei Dynasty was unable to capture Xuyi was that the cavalry troops in the Northern Wei Dynasty were not suitable for running between cities and fighting for a long time.