Sean (? -Former 186), a strategist of Liu Bang, the ancestor of the Western Han Dynasty. His ancestors were Koreans. After Qin destroyed Korea, he decided to avenge South Korea. Once, because of the attempted assassination of Qin Shihuang, he was hunted down and took refuge in Xiapi.

Sean has nothing to do next time. One day, while walking on Xiapi Bridge, he met an old man wearing a coarse cloth and a short coat. He walked beside Sean and deliberately dropped his shoes under the bridge. Then he turned to Sean and said, "Son! Get off the bridge and pick up my shoes! " Sean was shocked and wanted to give him a beating, but when he saw that he was an old man, he held back his anger and picked up the shoes under the bridge. The old man ordered again: "put on your shoes!" " "Sean thought that since he picked up the shoes, he might as well put them on, so he knelt on the ground and put them on himself. The old man put out his foot and asked Sean to help him put it on. Then he left with a smile. Sean has been watching his whereabouts with surprised eyes. The old man walked down the corridor, then turned to Sean and said, "You are a child who can be trained to be a successful person. Meet me here at dawn in the morning five days later! " Sean knelt down and said, "Yes." At first light on the fifth day, Sean arrived at Xiapi Bridge. Unexpectedly, the old man was already waiting there. When he saw Zhang Liang, he said angrily, "Why are you late for your date with the old man? Come back the next morning on the fifth day! " Say that finish and left. On the morning of the fifth day, as soon as the chicken crowed, Sean rushed over, but the old man was waiting there again. When he saw Zhang Liang, he said angrily, "Why did you fall behind me again? "Come early in five days!" Then he left again. On the fifth day, Sean arrived at the bridge before midnight. After a long wait, the old man came. He said happily, "Great." Then he took out a book, pointed to it and said, "If you study this book carefully, you can be the emperor's teacher!" " ! In ten years, the world will change and you will be rich. In the next 13 years, you will see me at the foot of Gucheng Mountain in Jibei County-there is a yellow stone there that is me. "The old man said and went away.

At dawn in the morning, Sean took out his book and read it. It turned out to be Sun Tzu's Art of War (assisted by Zhou Wuwang)! Sean cherishes it very much, often reads it carefully, and studies and studies it repeatedly.

10 years later, Chen Sheng and others rose up against the state of Qin, and more than 100 people responded. Pei Gong Liu Bang led thousands of troops and captured some places west of Xiapi. Sean joined him and became his subordinate. Since then, he has often given advice to Pei Gong according to Sun Tzu's Art of War, and Pei recognized it as very good and often adopted his strategy. Later, he became Liu Bang's strategist who strategized and won thousands of miles. After Liu Bang proclaimed himself emperor, he was named Liu Hou.

Sean will never forget the old man who taught him the art of war. 13 years later, when he followed Liu Bang through Jibei, he saw a yellow stone at the foot of the ancient city mountain and took it back, calling it "Huang Shigong", which was a treasure and sacrificed on time. After Sean died, his family buried Yellowstone National Park with him.