In the 16th year of King Ding Zhou (453 years before), the state of Jin divided Zhao, Wei and Han into three parts, which was called "three-part Jin" in history. Zhao, Wei and Han divided the world into three parts, which actually became three vassal States. In Shanxi, Zhao governs the central, northeast and southeast, Wei governs the southwest and southeast, and South Korea governs the southeast and southwest.
At first, the capital of Zhao was in Jinyang (now northeast of Jinyuan District of Taiyuan), the capital of South Korea was in Pingyang (now Yaodu District of Linfen), and the capital of Wei was in Anyi (now north of Xiaxian County of Yuncheng). Later, with the expansion of territory, it moved to Henan, Hebei and other places. In the 23rd year of Wei Lie Zhou (403 BC), the Emperor of the Eastern Zhou Dynasty officially recognized the princes of Zhao, Wei and Bill Han, and the history of China began to enter the Warring States Period. Shanxi belongs to Zhao, Wei and Korea.
Extended data
During the Warring States period, South Korea was in a bad situation. It can be said that it was surrounded by Qin, Zhao, Wei and Chu. Topographically, it can be said that in the event of war, South Korea is the most vulnerable.
It is precisely because South Korea has such a topographical environment that they must have a skill. South Korea's foreign trade was one of the best at that time. South Korea's terrain is conducive to selling weapons to other countries, and the weapons made in South Korea are also relatively sophisticated.
Shang Yang was originally from Wei State, and later took refuge in Qin State. Shen Buhai, whom he knew, went to South Korea. At that time, everyone had their own progressive thinkers to be reckoned with. During the political reform, Shang Yang emphasized law and discipline, while Shen Buhai emphasized "technique".
When Shen Buhai helped South Korea, South Korea reached its peak under his reform. After Shen Buhai's death, South Korea gradually declined without good governance. Qin attacked South Korea first because Shang Yang knew that there was a thinker as capable as him in South Korea. If he leads South Korea, the consequences will be unimaginable. He defeated South Korea before it became powerful, so as to eliminate future troubles.
Baidu Encyclopedia-Korea (one of the Seven Heroes of the Warring States Period)