Five years after Song Taizong settled down and rejuvenated the country, Yang Ye defeated the Liao army in the battle of Yanmenguan, which had a great influence all over the world. In the third year of Yongxi, it was decided to recover sixteen states in the Northern Expedition, with Pan Mei (the prototype of Pan Renmei in The Romance) as the commander-in-chief of the standard army and Yang Ye as the deputy commander-in-chief, attacking the Liao State. After the armies of all walks of life captured the four states of Ying, Huan and Shuozhou, Cao Bin's troops of the Eastern Route Army were defeated in the battle of Qigou Pass, and all the army horses were forced to withdraw. The imperial court issued a decree to move the people of four states to the mainland, with Yang Ye and Pan Mei as soldiers to defend the people.
At this time, Liao will attack Atlas State again. Yang Ye thought that the Liao army was on a roll, so it was not suitable for confrontation. Just send some people to Shijie Valley to ensure the smooth evacuation of the people. Wang Shu, an army supervisor, disagreed, thinking that Song Jun's troops were not under the Liao army, and he should face the charge of killing the enemy and serving the country. Pan Mei adopted Wang Shu's initiative and deployed in Chenjiagukou to face the Liao army. In this battle, the Liao army invested a large number of cavalry, and the infantry fighting in the plain was a living target. Song Jun was defeated, Yang Ye's second son, Yang Yanyu, died, Yang Ye was shot by an arrow, and then he died of hunger strike. Pan Mei adopted Wang Shu's opinion and was written as the sworn enemy of the great traitor Yang Jiajiang in The Romance. In fact, Pan Mei did some obligations for Yang Ye's death this time, and he was also the founding star of the Northern Song Dynasty.
During the Five Dynasties and Ten Kingdoms period, the regime changed frequently. In 979 AD, Song Taizong personally conquered the Northern Han Dynasty, and the Northern Han Dynasty perished. Yang Ye, the general of the Northern Han Dynasty, also surrendered to the Song Dynasty with the Northern Han Dynasty. Yang Ye, whose real name is Yang Chonggui, was highly valued by Liu Chong when he was young. Liu Chong adopted him as his adopted grandson and changed his name to Liu. Liu initially served as the defense commander and was famous for his bravery. Because of his merits, he was promoted to the army of Xiong Jian.
Because of Liu's outstanding exploits and invincible, China people claim to be invincible. However, Liu's achievements in the Northern Han Dynasty for more than 30 years were lost in the vast history. History of Song Dynasty and History of Liao Dynasty lack such records. As mentioned in the History of Song Dynasty, there were several confrontations with Liu, all of which ended in Liu's failure. As a Mirror, it is only mentioned that Liu fought bloody battles in Taiyuan Chengtou, and even after Liu Jiyuan, the main commander of the Northern Han Dynasty, surrendered, he still insisted on fighting. It was not until Liu Jiyuan was sent to surrender himself that Liu Cai surrendered in tears.