Cao Cao's achievements: (1) unified the north, ended the local separatist regime, and made contributions to promoting national unity. In any case, he is loyal to the emperor. Cao Cao gradually unified the north, ending the chaotic situation since the middle and late Eastern Han Dynasty, stabilizing the production in the north, bringing considerable peace to the people in the north and cultivating the population. Cao Cao can't predict the gains and losses of future generations, but as far as his personal achievements are concerned, (2) he set an example and advocated frugality, which curbed the erosion in the last years of the Eastern Han Dynasty. 2. Cao Cao's fault: (1) The usage is harsh, aiming at the loose phenomenon at the end of the Eastern Han Dynasty, overcorrecting it and giving it to the people. However, overcorrection and harsh laws have caused certain harm to the people. (2) killing innocent people, including ordinary people and literati. Xuzhou revenge war, hundreds of thousands of innocent people were slaughtered in Xuzhou, which has far exceeded the purpose of revenge and is quite ruthless; The attitude of scholar-officials towards Cao can be divided into two categories: one is to take Xun as the head, or to appreciate his heroism and strategy; A concern about his origins-after the eunuch. The former is a die-hard supporter of Cao Cao, helping him unify; The latter criticized this. Of course, political opponents must be eliminated, but Cao Cao's death of Cui Yan is very wrong. (3) Organize grave robbery, although many celebrities have done such things before, such as Lu Bu. Cao Cao set up a gold-touching business and engaged in grave digging activities;

Advise Blade not to call foreign soldiers.

General He Jin gained power by killing eunuchs, so he decided to invite the secretariat of Liang and Dong Zhuo to lead his troops to the "Qingjun side" of Beijing. This is definitely a stupid "bad idea". As the right-hand man of blades, Cao Cao is sensitive to the seriousness of the problem. He advised He Jin: "The curse of eunuchs has existed in ancient and modern times; However, the Lord should not destroy false rights and make it so. If you want to be punished, you must get rid of Yuan Xie, but it is enough to pay a jailer. Why are foreign soldiers called in one after another? If you want to punish it, it will show. I expect it to be defeated. " This suggestion shows that Cao Cao has a clear understanding of the current situation and dares to give advice. Unfortunately, instead of listening to advice, blades angered Cao Cao and called him selfish. The subsequent development proved that Dong Zhuo's entry into Beijing was the beginning of the chaos in the Eastern Han Dynasty, which directly led to He Jin's execution by eunuchs. Blades in grave, regret not listening to Cao Mengde.

Jiao Zhao set out to beg Dong Zhuo.

Holding high the banner of righteousness for the first time and cracking down on treacherous court official Dong Zhuo undoubtedly won enough popularity and political capital for Cao Cao. When Dong Zhuo messed up the platform, which made the Eastern Han regime malodorous and officials worried all the time, Cao Cao was able to take a clear-cut stand against Dong Zhuo, and corrected all kinds of recruitment methods, * * * against Dong Zhuo. In the fifth part of Romance of the Three Kingdoms, Cao Cao "issued rectification letters, reported to all factions in time, then recruited volunteers, erected a white flag to recruit soldiers, and wrote down the word" loyalty ". In a few days, the person who should be recruited will be like a jade collection. " In this incident, Cao Cao faced great power, dared to resist, and dared to be the first in the world, showing his extraordinary courage and courage. In addition, Cao Cao called on the volunteers with the word "loyalty" and crusaded against Dong Zhuo in the name of the imperial court, which was justified and showed excellent political strategy and wisdom.