Guo Jia (170-207), courtesy name Fengxiao, was a native of Yangzhai, Yingchuan (now Yuzhou, Henan). He was an outstanding counselor in the late Eastern Han Dynasty. He first made suggestions in the stronger Yuan Shao's army, but later found out that Yuan Shao could not succeed in his great cause, so he turned to Cao Cao and made great contributions to Cao Cao's unification of northern China. History books called him "a genius in strategy and strategy, and a strange man in the world." Cao Cao praised him for his knowledge and being his "Qi Zuo". Official position: Commander of the Air Force Sacrifice Wine (Military Division Sacrifice Wine); Title: Weiyang Tinghou, posthumous title: Zhenhou

Guo Jia was born in Yingchuan, which is today's Dengfeng area in Henan. This place was the largest talent pool during the Three Kingdoms period. At that time, sixty-seven out of ten counselors who advised heroes from all walks of life came from this place. Guo Jia showed extraordinary wisdom when he was a boy. He liked to talk with the elders and often had unique insights, which often made the elders feel inferior. Once, a sorcerer from out of town was amazed when he saw little Guo Jia, calling the boy the reincarnation of Grand Duke Jiang Ziya. From then on, Guo Jia had a nickname - "Little Grand Duke". As time goes by, Guo Jia, who has read poetry and books, grows up in an instant. He is thin and handsome, and has a pair of clear and deep eyes. This "little grandpa" is confident and aloof. He likes to be unrestrained. He is very picky about making friends and only associates with people with lofty ideals. But he is very sincere and enthusiastic towards his friends, and he likes to drink and talk all night long. When Guo Jia was 21 years old, he defected to Yuan Shao's tent at the instigation of his friend Tian Feng and others. Yuan Shao was called "the hero of the world" at that time. He respected Guo Jia and others very much and treated them with courtesy. But after dozens of days, Guo Jia realized that Yuan Shao did not know how to employ people and was not a man who could achieve great things. Therefore, Guo Jia left Yuan resolutely. Guo Jia left Yuan Shao when he was at his most prosperous. This not only required great courage, but also extraordinary vision. In this way, Guo Jia has been unemployed for 6 years. In 196 AD, Xi Zhicai, a counselor whom Cao Cao valued highly, passed away. Feeling sad, Cao Cao wrote to Xun Yu and asked him to recommend a counselor who could succeed Xi Zhicai. So Xun Yu recommended his friend Guo Jia to Cao Cao. Cao Cao was overjoyed. He welcomed Guo Jia from ten miles away and took him into his camp, where he discussed major world affairs. The importance of this meeting was by no means less than that of the later "Longzhong Duo". Guo Jia was younger than Cao Cao, but he seemed to know Cao Cao's great national ambitions very well. When Cao Cao asked Guo Jia about the situation of the world, Guo Jia made it clear. The key is to take advantage of Cao Cao's opportunity to attack Gongsun Zan. This will not only expand Cao's army's strength, but also prevent Lu Bu from threatening Cao's army from the flanks during the decisive battle between Cao and Yuan. Cao Cao also asked Guo Jia about the most critical qualities of a counselor. What is it? Guo Jia said that war is like playing chess. No war is planned in advance. Being familiar with the art of war is just an introduction. The strength of a military advisor lies in adapting to the situation. Guo Jia's clear and thorough analysis allowed Cao Cao to see the bright future. In the future. After hearing this, Cao Cao sighed, "This is the person who can accomplish great things alone." ’ After Guo Jia left the camp, he was overjoyed and said, “He is my true lord.” From then on, Guo Jia became Cao Cao’s military staff officer, offering military sacrifices to Cao Cao’s four-way campaign and serving faithfully.