In the first year of Jingchu (237), Emperor Wei Ming Cao Rui sent an envoy to recruit Gongsun Yuan to join the court. There must be no return after this departure, so Gongsun Yuan sent troops to attac

In the first year of Jingchu (237), Emperor Wei Ming Cao Rui sent an envoy to recruit Gongsun Yuan to join the court. There must be no return after this departure, so Gongsun Yuan sent troops to attack Guanqiu Jian, the governor of Youzhou, and won. Originally, Liaodong and Cao Wei were not subordinate to each other, so surrendering to Cao Wei was just an expedient measure for the Gongsun family. After defeating Guanqiu Jian, Gongsun Yuan broke up with Cao Wei and simply established himself as King of Yan. He also established the Yuan Dynasty as "Shao Han" and had all the officials and officials. In the first month of the following year, Cao Rui sent Sima Yi with 40,000 infantry and cavalry to conquer Gongsun Yuan. After the heavy rain stopped, the Wei army surrounded Xiangping and launched a fierce attack. Since Sima Yi had plenty of food and grass, but the Yan army was short of food and grass, some of Gongsun Yuan's generals had begun to surrender.

Gongsun Yuan was desperate and prepared to surrender but was not allowed by Sima Yi. Gongsun Yuan had no choice but to break out of the encirclement. Sima Yi sent troops to attack again, and Gongsun Yuan died on the spot. After defeating Gongsun Yuan's forces, Sima Yi did something very common in the Three Kingdoms - massacre the city. Sima Yi massacred more than 7,000 men over the age of 15, beheaded more than 2,000 civil servants and military officers appointed by Gongsun Yuan, and incorporated the remaining 40,000 households into Wei Min. Sima Yi's massacre of the city is indeed not a glorious thing, but in terms of the number of victims, Sima Yi is not worth mentioning in front of Cao Cao.

The "Book of the Later Han Dynasty" records: "In the fourth year of Chuping, Cao Cao... overran Lu, Juling, and Xiaqiu, and slaughtered them all. Hundreds of thousands of men and women were killed, and no chickens or dogs were left. Surabaya was "Three Kingdoms" records: "Qian General Cao Bao and Liu Bei stationed in Tandong, hoping that Taizu would defeat them, so they attacked Xiangben and killed many of them."

Sima Yi followed the example of his predecessors and used the simplest and crudest method to solve the Liaodong problem that had troubled Cao Wei for decades. But unlike the impact of Cao Cao's previous massacre of the city, it seemed to be once and for all, but it influenced later generations for more than a thousand years. From Gongsun Du to Gongsun Yuan, the Gongsun family has managed Liaodong for four generations and has always been the most powerful existence in Liaodong. Not only that, the Gongsun family has always suppressed the surrounding ethnic minorities: the first Gongsun Du defeated Wuhuan and defeated Goguryeo; the second Gongsun Kang conquered the capital of Goguryeo and defeated Han Hao; the third Gongsun Gong and the fourth Gongsun Yuan also attacked surrounding foreign tribes many times.

The Gongsun family’s spirit and tradition of controlling and suppressing surrounding foreign races has been deeply rooted in the bones of the Han people in Liaodong. Even if Sima Yi defeated the Gongsun family, the Han people in Liaodong would still continue their martial spirit. All this ceased to exist with Sima Yi's massacre of the city and the inward migration of the people in Liaodong. Those who could fight were slaughtered by Sima Yi, and those who couldn't fight but knew they had to fight were moved inland by Sima Yi. Since then, there have been no Han forces in Liaodong that suppressed the development of various ethnic groups and other forces, and the Han dynasty has never effectively ruled Liaodong. Even if it was as powerful as the Tang Dynasty, it was only managed by the Anton Protectorate.