Guo Jia was originally a subordinate of Yuan Shao, but later he took refuge in Cao Cao and made great contributions to Cao Cao's unification of northern China. All the officials offered a glass of wine to the military adviser, and named Yang Wei. At the age of 38, he died when Cao Cao conquered Wuwan. Shi Yue Hou Zhen.
History books call him "a brilliant and resourceful man, a world miracle". Cao Cao praised him for his knowledge and was his "Zuo Qi".
Among many advisers of Cao Cao, Guo Jia is the only one who knows Cao Cao best, and they are close as friends. According to the report, two people walk in the same car and sit at the same table. In the account of Cao Ying, who is strict in running the army, Guo Jia has many unreasonable behaviors, but in Cao Cao's eyes, "this is an extraordinary person and should not be arrested by common sense." One of Cao Cao's discipline inspection officials, named Chen Qun, once typed a book by Guo Jia because of his bad behavior.