Because Zhang Liangzu was the prime minister of South Korea during the Warring States Period, he always wanted to restore the country to South Korea after Qin destroyed the six countries and unified the world. He also tried to murder Qin Shihuang, but failed to kill him. Later, he was wanted by the whole country and changed his name to hide around. On the way, I met Liu Bang's army and followed it temporarily.

At that time, Sean told people what he had learned about the squire's art of war, but others could not understand it. Only Liu Bang applauded and often used his tricks. Sean was very emotional: "Pei Gong is really a favored son of heaven", so he simply followed him instead of looking for Ju Jing.

Later, Liu Bang defected to Xiang Liang, and Xiang Liang made the former son of the Korean royal family the King of Korea, and Sean a disciple of Korea, following the King of Korea. Later, Sean went out with Liu Bang to tackle key problems, and returned to Hanwang City after Xiang Yu enfeoffed the world. But Xiang Yu did not let Han Wangcheng go to his country, but found an excuse to kill him. So Sean fled to Liu Bang and has been following Liu Bang ever since.

In Sean's view, the main reason why he followed Liu Bang was that only Liu Bang could understand and adopt his strategy. If the boss doesn't understand, he won't use it, and it's no use making you full of literary talent.