Xiao Punu responded to the "order" and took the order.

Seeing Xiao Punu leaving, Ye Luxian remembered that the queen had left the palace, so he asked Yan Yan: "Empress, what is the urgent military situation that makes you rush to the Wuluan Hall in front of you?" ”

Yan Yan replied: "Your Majesty, it's really something in the Han Kingdom!" ”

Yelu Xiandao asked carefully, and Yan Yan then told the Song army to take advantage of the civil strife between the Han State and Liao, and the emperor of the Song Dynasty, Zhao Kuangyin, to drive his own conquest to coerce Jinyang.

It turned out that as early as the first year of Kaibao in the Northern Song Dynasty (968 AD), after Zhao Kuangyin, Taizu of the Song Dynasty, pacified Houshu, it happened that Liu Chengjun, the second emperor of the Han Kingdom (known as the Northern Han Dynasty), had just died of illness in Taiyuan, and Liu Chengjun's adopted son and nephew Liu Jien (formerly known as Xue Jien) seized the throne. After Liu Jien succeeded to the throne, he immediately sent an envoy to report to the Liao State, which was recognized by Liao Muzong, but Guo Wuwei, a powerful minister of the Han State, monopolized the power and had a tense relationship with Liu Jien. Liu Jien was first jealous of Guo Wuwei's failure to speak for himself during Liu Chengjun's lifetime, and then he was even more jealous of the latter's power tilting towards the government and the opposition, in order to regain his own imperial power, the two fought for power and profit, causing the hearts of the people in Jinyang City to fluctuate. Zhao Kuangyin then raised a heavy army, intending to take advantage of the victory of the pacification of Houshu, strike while the iron was hot, destroy the Han State, solve the secession regime sandwiched between Song and Liao in one fell swoop, and lay the foundation for further settlement of the sixteen states of Youyun in the future. In August of that year, Zhao Kuangyin ordered Li Jixun, the envoy of the Zhaoyi Jiedu, the commander of the guard infantry army, the envoy of the Xuanhui Southern Yuan Cao Bin, the defense envoy of Dizhou He Jiyun, the defense envoy Kang Yanzhao of Huaizhou, and the envoy Zhao Zan of the Jianwu Jiedu to attack Jinyang from Lu (now Changzhi City, Shanxi) and Jin (now Linfen City, Shanxi) respectively.

In September of this year, there was internal strife within the Northern Han Dynasty: first, Liu Jien gradually emptied Guo Wuwei through a series of means, and then the disgruntled Guo Wuwei took the opportunity of Liu Jien's banquet to invite the ministers, and secretly sent his henchman Hou Barong to kill Liu Jien, who had just been on the throne for 60 days, and then Guo Wuwei sent someone to kill Hou Barong in the name of Hou Barong's murder. After this murder, Guo Wuwei set up Liu Chengjun's other adopted son, Liu Jiyuan, as the emperor, in a vain attempt to continue to control the power of the Han State.

On the day of Liu Jiyuan's accession to the throne, the Song army had already entered the country. Liu Jiyuan then informed the Liao State of his accession to the throne, and on the other hand, he urgently asked the Liao State for help, and at the same time ordered the guards Liu Jiye, Feng Jinke, and other guards to guard the Tuanbai Valley (now southeast of Qi County, Shanxi) to resist the Song army. However, the Song army took advantage of the victory of Houshu this time, and the peak of the army was very sharp, and the Northern Han Dynasty was unstable after this internal toss, so the Song army was like a bamboo, quickly broke through the Han army in front of it, and approached the city of Taiyuan.