Jiang Gan's stealing books is a well-known two-part allegorical saying, and Jiang Gan in the Three Kingdoms period became famous for it, but it was immortal rather than immortal. In Chapter 45 of Romance of the Three Kingdoms, it is said that Cao Cao and Wu Dong were defeated in the first battle. At this moment, Jiang Gan, a guest under the curtain, volunteered and surrendered Zhou Yu with his golden words. As a result, when Jiang Gan crossed the river and Zhou Yu played a prank, Jiang Gan stole the secret letter written to him by Zhang Cai, which caused Cao Cao to kill two generals by mistake. Unwilling to fail, Jiang Gan crossed the river for the second time and introduced Sun Liu's counselor Pang Tong to Cao Cao, who listened to Pang Tong's counsel. As a result, Sun Liu's allied troops burned Chibi and fled in defeat. However, it was this "super counselor" who didn't have a special biography in the history of the Three Kingdoms that decided Battle of Red Cliffs's success or failure. Only in Biography of Jiangbiao quoted by Pei, it is recorded that Jiang Gan is good-looking, good at talent, and it is right to walk alone between Jianghuai. Knowing that Zhou Yu was brilliant, Cao Cao sent Jiang Gan to Jiangdong as a lobbyist, hoping to bring Zhou Yu down. As a result, Zhou Yu met Jiang Gan and said to Jiang Gan, "My son has good wings. Why don't you come to Wan Li to be a lobbyist for Cao Shi?" Jiang Gan said, "I am far away from Jizhou, so it is treacherous to talk about elegance and integrity." Zhou Yu said, "I am not as generous and broad-minded as you, but I know music by listening to strings." Three days later, Zhou Yu invited Jiang Gan to visit Wu Dongjun Camp. During the dinner, he asked the waiter to show his clothes and jewels, and said, "When a husband meets the master of his bosom friend, he should entrust him with the righteousness of the monarch and the minister and bind him with the kindness of his own flesh and blood. When Su Ruo comes back, he still caresses his back and breaks his words. " Jiang Gan smiled, but never mentioned anything to persuade Zhou Yu. Later, Jiang Gan returned to China and praised Cao Cao for Zhou Yu's generosity and cleverness. It can be seen that Jiang Gan in history is not as stupid as in the romance. On the contrary, he is a celebrity in Jianghuai, who is good at arguing and has a small reputation in the local area. When Cao Cao learned about Zhou Yu's talent, everyone naturally had a love for talent. So he sent Zhou Yu's countryman and famous debater Jiang Gan to persuade Zhou Yu to surrender. Of course, when Cao Cao learned about Zhou Yu's talent, Comrade Jiang Gan, who has lived in the Jianghuai area for a long time, must also know. But for the sake of so-called credit and fame, I went to Zhou Yu's office to be a lobbyist for Cao Cao. But when Jiang Gan went to Zhou Yu's place and saw Zhou Yu's determination and position, he expected that he would not give up the position of Soochow strategist in order to be a small official of Cao Cao. So in the next few days, Jiang Gan's formal expression of Zhou Yu didn't show his eloquence, but he ate and drank well and went back to find Cao Cao for a job. History ends here, and then Jiang Gan no longer appears. In Romance of the Three Kingdoms, he boasted that Jiang Gan was the "immortal leader", and Cao Cao "worshipped Jiang Gan as his teacher" as soon as he saw it. I want to cite Jiang Gan to highlight Cao Cao's stupidity. However, after The Romance of the Three Kingdoms appeared, although Jiang Gan lost the title of "immortal", he became an extremely stupid fool. This is obviously a distortion of Jiang Gan in the novel, and it is also to transfer all the responsibility for Battle of Red Cliffs's failure to Cao Cao, and to increase the rationality and justice of Sun and Liu Shengli. Of course, if Jiang Gan didn't pay for what he knew he couldn't do, he wouldn't go to Zhou Yu as a lobbyist. Perhaps in the Romance of the Three Kingdoms, Mr. Luo Can was also written as a eloquent man. However, because of his lust for nicknames, he was finally positioned as a "clown" by the judges in Luo Guanzhong. Then through the mass propaganda of "romance", it was really famous, but it was immortal.

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