1. Yan State from Shang Dynasty to Spring and Autumn Period was founded by Wa surname, which was called Nanyan State in history. At first, the monarch of the country, Botong, was called a descendant of the Yellow Emperor, and in the Shang Dynasty, he was called Yan.

2. The Yan State from the Western Zhou Dynasty to the Warring States Period was established by Yan Zhaogong, a vassal state enfeoffed by the Zhou Emperor, in the 1 1 century BC, and later became one of the Seven Heroes of the Warring States;

The Yan State established by Murong Mu in 3.337 was called Yan Qian in history;

The Yan State established in Mu Rongchui in 4.384 was called Houyan in history;

The Yan State established by Murong Hong in 5.384 was called Xiyan in history;

In 6.398, Murong De established a country with Yan as its title and became the Southern Yan in history;

In 7.407, the Yan State established by Gao Yun became the Northern Yan in history;

8. During the Five Dynasties and Ten Kingdoms period, Liu Shouguang established the Yan State on 9 1 1, which was called Yan Jie in history.