King Helu of Wu defeated the Chu State and became the overlord of the south. Wu State had always been at odds with the nearby Yue State. In 496 BC, King Gou Jian of the State of Yue came to the throne. King Wu took the opportunity to send troops to attack the State of Yue, and a great war broke out between Wu and Yue. King Helu of Wu was full of confidence, but he did not expect that he would be defeated in the end. He also died of his injuries. Before he died, he told his son Fucha: "Don't forget to avenge the country of Yue." Later, Fucha came to the throne and vowed to destroy the country of Yue. , he asked Wu Zixu and another minister Bo Pi (pǐ) to train their troops and horses every day to prepare for the attack on Yue. Three years later, King Wu Fu Chai personally led an army to attack Yue. Gou Jian of the State of Yue did not listen to the persuasion of the doctor Fan Li (sound lí) and insisted on sending troops to fight the King of Wu. As a result, he was severely defeated. King Gou Jian of the State of Yue took 5,000 remaining defeated generals and fled to Duduji, Yue, where they were besieged by the Wu army. Gou Jian was very regretful at this time. He said to Fan Li: "I regret not listening to you and getting into this situation. What should I do now?" Fan Li said: "Let's go and sue for peace quickly." So Gou Jian sent Dr. Wen Zhong to arrive. He went to the King of Wu's camp to sue for peace, and bribed Bo Pi of Wu State, asking him to speak well to Fu Chai. In the end, King Wu Fuchai ignored Wu Zixu's objection and agreed to Yue's request for peace, but he wanted Gou Jian to be a slave in Wu. Wen Zhong went back and reported to Gou Jian. Gou Jian entrusted the state affairs to Wen Zhong and took his wife and Fan Li to the state of Wu. When Gou Jian arrived in the state of Wu, Fu Chai let the couple live in a stone house and asked Gou Jian to feed his horses. Fan Li followed him to work as a slave. After two years of this, Fu Chai thought that Gou Jian had sincerely surrendered to him, so he let Gou Jian return to his country. After Gou Jian returned to Yue, he was determined to avenge his humiliation. He was afraid that the comfortable life in front of him would weaken his ambition. He moved into a dilapidated stable, removed the mats, used firewood as a mattress, and hung a gall in the eating place. When eating, taste the bitterness first and ask yourself: "Have you forgotten the shame of Kuaiji?" I persisted like this for twenty years. Later Gou Jian went north to the Central Plains to form an alliance with the princes and became the last overlord in the Spring and Autumn Period.