After his death, his adopted son Liu Jicheng became the king. However, Emperor Liu Dang was stabbed and killed less than two months ago, and the cause of death was unknown. The minister elected Liu Jiyuan as emperor.
Liu once fought a war with. It was in 968, when the Northern Han Dynasty was attacked, and Liu was responsible for blocking it in Taigu, Shanxi. Due to the disparity in strength, Liu fought and retreated, and finally retreated to Taiyuan City, successfully organizing the defense of Taiyuan, forcing Lao Zhao to withdraw his troops without profit. Liu was the most powerful opponent of the Song Dynasty in the United War, and the Northern Han Dynasty became the most difficult bone in the separatist regime. Because of his outstanding military exploits, Liu was nicknamed "Yang Invincible".
In 979, Song Taizong, who had just acceded to the throne, was eager to establish his prestige and divert people's attention from his abnormal accession to the throne. He raised an army to personally expedition to the Northern Han Dynasty.
As the main force of the Northern Han Dynasty, Yang Invincible adhered to the southeast defense line of Taiyuan City, which was called "killing without counting" in history. Liu Jiyuan, the Emperor of the Northern Han Dynasty, recently couldn't stand the stimulation of Song Jun's attack, and his psychological pressure was too great. He actually surrendered by opening the north gate of Taiyuan. Yang invincible did not know the inside story and continued to resist. Other wars are over, but Song Jun just can't take Taiyuan, the southeast town. Finally, Song Taizong had no choice but to send Liu Jiyuan to surrender.
Invincible stationed with Yang, compound surname Yang, renamed Yang Ye, as Zhengzhou defense ambassador. Therefore, Yang Invincible's name is either Liu or Yang Ye, and he has never been called. This name was later called.
Soon after, the Liao army invaded the south on a large scale, and the northern frontier of Song and Ting was tight, and the courtiers were at a loss. Emperor Taizong thought of Yang invincible again. Immediately send him to Yan and Yun to attack Liao. Although he is only General Pan Mei's deputy, he has his own army and is very active. In the battle of Yanmenguan, Liao soldiers were killed and two Liao generals were captured. From then on, as long as the Liao army saw Yang's invincible banner, it would make a detour and refused to confront each other.
At this point, Yang was less than a year old. A general made such meritorious deeds in less than a year and got rich rewards. Emperor Taizong was naturally happy, but it aroused the envy of the old generals in the Song Dynasty. One of the most jealous is Yang Ye's boss Pan Mei. This also laid the foundation for Yang Ye to fight against Liao in the future.
After Yang Ye's death, his descendants continued to fight Liao. Among them, Yang and Yang are the most famous. Ouyang Xiu, a famous writer in the Northern Song Dynasty, praised Yang Ye and Yang as "father and son, who are invincible in wisdom and courage. Up to now, people all over the world can tell the truth about Lear. Folk artists in the Song and Yuan Dynasties put the story of the Yang family into a drama and put it on the stage. In the Ming Dynasty, people compiled their stories into Romance of Yang Jiajiang and Biography of Yang Jiajiang, which were widely circulated among the people in the form of novel storytelling. However, according to historical research, She Taijun, Mu and other figures are not real people, but folk fabrications.
In Daixian County, Shanxi Province, there is an ancient bell and drum tower with two huge plaques on it, namely, "Three Pass of Megatron" and "Four Famous Halls". Legend has it that it was built to commemorate Yang Jiajiang's immortal feats, which has been passed down to this day and is a precious relic.
Yang Ye has eight sons. Only the sixth son has descendants, and Yang, a famous star in the mid-Northern Song Dynasty, is his son.