After Battle of Red Cliffs in 208 AD, Sun and Liu joined hands to advance, and after years of fierce fighting, they finally captured Jingzhou City. Because Jingzhou is an important military town, Zhou Yu, the head coach of Soochow, was appointed as the prefect of Nanjun, and Liu Bei, who has made great contributions, can only lead his troops to defend the oil mouth in the south of the Yangtze River and set up camp. Liu Bei was named General Zuo and Duke Zuo by Emperor Xian of Han Dynasty. After Liu Bei entered the oil port, he changed the oil port to public security, which means "Zuo Gongjing will be strong in the future". Liu Bei lived in public security, and the narrow land was not conducive to development. He borrowed Jingzhou from Sun Quan twice. Sun Quan adopted Zhou Yu's suggestion, and instead of borrowing Jingzhou, he used the marriage between Wu and Shu to house arrest Liu Bei, making Liu Bei, who was in his fifties, a charming guest of Soochow. In 2 10, Zhou Yu died and Lu Su succeeded to the throne. Lu Su persuaded Sun Quan to temporarily lend Jingzhou to Liu Bei, considering the strategic policy of resisting Cao Cao from the Wu-Shu alliance. After Liu Bei borrowed Jingzhou, he took Jingzhou as his foothold, resisted Cao Cao in the north and took Yizhou in the west, and established the Han Shu regime. Up to now, there is still a saying that "Liu Bei borrows Jingzhou, and once he borrows it, he will not pay it back".