Many people will ask why Yan Shicheng, the king of Yanbei, was defeated so easily, but Xun Yan was able to become emperor through Yanbei soldiers. Let's look through the original.
Yan Shicheng in the original work is the emperor's own brother, Yan Shicheng, the emperor and the general who killed Yan Shicheng. The three of them should have been close before they met Xun Yan's mother, when they went out to play together. It can be seen that all three people liked Xun Yan's mother at that time, but in the end, Xun Yan's mother chose Yan Shicheng. Later, the emperor ascended the throne and became the ninth five-year plan, and Yanshicheng became the captaincy of Yanbei. Yan Shicheng became the queen of San Francisco and was also loyal. On many occasions, your majesty and the emperor who came out of the quagmire have said that you will be rich with Yan Shicheng in your life (roughly this meaning).
Therefore, the loyal Yan Shicheng never imagined that one day it would be his own brother, His Majesty the Emperor, who saved each other's lives many times. He was the first person to set an example for this brotherhood among prisoners, leaving his son in Kyoto. That night, Xun Yan got the emperor's consent and allowed him to return to Yanbei to visit his family. He wants to go back to Xun Yan because he knows that Yan Shicheng will come back. It can be said that this sudden change is completely unprepared, and everyone in Yanbei is completely unprepared. Suddenly, the army killed him. Even Yan Shicheng, who is famous for his exploits, has no way to turn the tide. Under the careful planning of the enemy, some of Yan Shicheng's troops betrayed him, and finally.
It was only a mental calculation that killed Yan Shicheng so easily. If there is a head-on confrontation, the outcome is really uncertain. Maybe Yan Shicheng lost, because he didn't see the true colors of the emperor, and he placed a piece of loyalty to human nature.