Whose advice did Emperor Wen of Han adopt?

During the reign of Emperor Wen of Han Dynasty, Chao Cuo published "Guarding the Border, Persuading Farmers and Caring for Farmers" and "Recruiting People and Caring for People", proposing to block immigrants to resist foreign invasion, which was adopted. When Emperor Jing of Han Dynasty arrived, Chao Cuo advocated the forced separation of vassal states, which led to the chaos of the Seven Kingdoms. Seven vassal states, led by the prince of Wu and Liu Bi, rebelled in the name of "Please punish Chao Cuo and stand on the side of the Qing monarch".

Related knowledge:

After the death of Emperor Wen of Han Dynasty, Emperor Jing of Han Dynasty still carried out the policy of "kinship" towards Xiongnu, but also continued to carry out the policy of "appealing to the people and consolidating the border". With the strengthening of the defense forces in the Han Dynasty, the military harassment of Xiongnu in the border areas was also curbed.

During the reign of Emperor Jing of Han Dynasty (16), the number of Huns invading the border was greatly reduced, and only three times were recorded. The biggest time, that is, in June of the sixth year of Emperor Jing of Han Dynasty (BC 144), the Huns entered Yanmen, attacked Wuquan (now northeast of Hohhot, Inner Mongolia), and entered Shang Jun (now south of Yulin, Shaanxi) to plunder horses of the Han Dynasty. The officers and men of the Han Dynasty fought back, and the death toll was as high as 2,000. In addition, during the reign of Emperor Jingdi, there was no large-scale military harassment by Xiongnu.

Emperor Wendi and Emperor Jingdi relied on the policy of "recruiting the people and consolidating the frontier" put forward by Chao Cuo, and treated the military invasion of Xiongnu not only by passive retreat, but mainly by actively strengthening the defensive forces, thus achieving the purpose of avoiding and reducing wars and creating a peaceful environment for the recuperation of the Han Dynasty.