Guo Jia was Cao Cao's most important adviser after playing Zhicai, Cao Cao saw Guo Jia for the first time, after talking between the two sides, Cao Cao pointed at Guo Jia and said to the others: The person who can help me achieve my great cause is him! As soon as Guo Jia, who was full of smiles, walked out of the tent, he yelled at the sky: This is my real master! Cao Cao and Guo Jia, like a pair of close friends who hated each other and hated each other, soon revealed their true feelings in a series of mutual cooperation.
Guo Jia's most bullish prophecy was that during the Battle of Guandu, Cao Cao was worried that Xuchang in the rear would be easily attacked by Sun Ce, and Guo Jia said that people like Sun Ce were easily plotted and retaliated against by villains, and in the end Sun Ce was really killed by the assassins sent by the enemy family, and the gods of strategy doubted whether the assassin was sent by Guo Jia. After Yuan Shao died, the remnants of the Yuan family were still not to be underestimated, and Guo Jia told Cao Cao that we should first temporarily withdraw our troops and wait for the two sons of the Yuan family to kill each other, and we would break them one by one.
Guo Jia successfully predicted sun ce's murder by the assassins, proving his clever calculations, and it was not absolutely impossible to predict that Sima Yi might rebel. After Cao Cao's defeat at the Battle of Chibi, he regretted that he should not listen to Guo Fengxiao's words, indicating that Guo Jia made some predictions to Cao Cao before his death. For the question of the subject, Guo Jia has a prophecy that it is possible, but after all, there is no historical data to confirm it. Guo Jia died of illness in 207, and Sima Yi was born in 208. The two did not work together, but it does not mean that Guo Jia did not understand Sima Yi, but it also does not mean that Guo Jia had this prophecy for Sima Yi.
Cao Cao once said that Guo Jia was the one who could help him achieve great things, and when Guo Jia was alive, Cao Cao pacified the north, and he often had strange plots, "Capture Lü Bu in the east, take The Gu gu in the west, behead the head of Yuan Tan, the people of Pingshuo Soil, overstep the danger, flatten Karasuma, shock the Liaodong, and take Yuan Shang." "Guo Jia has made meritorious contributions. It was only on the way back from Liucheng that Guo Jia died young at the age of 37 because of the unsatisfactory water and soil, the harsh climate, coupled with the rapid travel day and night, overwork.