The story of killing with a knife is more than 200 words.

Killing with a knife is a clever use of contradictory strategies to preserve one's strength. When the enemy's movements are clear, do everything possible to induce friendly troops with ambiguous attitudes to send troops to attack the enemy quickly, so that their main force can avoid losses. This plan is based on the "lost" hexagram in the sixty-four hexagrams of Zhouyi. "yue: the loss of the next benefit is the increase of the upper benefit. This divination holds that "gains and losses" cannot be completely separated, and the two complement each other and are full of dialectical thoughts. This means that we can attack our enemies with the help of others. Although we will inevitably have small losses, we can win the game and gain a lot.

At the end of the Spring and Autumn Period, Qi Huangong sent him as a general's credentials to attack Lu. The strength of Lu was lost to Qi, and the situation was critical. Zi Gong, a disciple of Confucius, analyzed the situation and thought that only the State of Wu could compete with the State of Qi. So Zigong lobbied Chang of Qi State. Tian Chang plotted to usurp the throne, eager to eradicate dissidents. Based on the principle of "worrying about attacking the weak from outside and attacking the strong from inside", Zi Gong advised him not to let dissidents actively expand their forces to attack the weak Shandong, but to attack Wu with the help of powerful countries and eradicate dissidents. Tian Chang was very moved, but because Qi had a good plan to attack Lu, he turned to attack Wu for fear of being unknown. Zi Gong said, "Yi. I'll persuade Wu to save Rufaqi at once. Isn't this the reason for attacking Wu? " Tian Chang agreed happily. Zi Gong rushed to Wu State and said to Fu Cha, the king of Wu, "If Qi State takes Lu State and becomes strong, it will surely defeat Wu State. Why doesn't the king strike first, unite with Lu to attack Qi, and let him compete with Qiang Jin and claim hegemony? " Zi Gong continued to persuade Zhao to send troops and cut Qi with Wu, which solved the worries of the prince of Wu. Zigong lobbied the three countries and achieved the expected goal. He thought that after Wu defeated Qi, he would blackmail Lu, and Lu could not really solve the crisis. So he sneaked into the state of Jin and showed his interest: if he succeeded, he would definitely turn to attack the state of Jin and compete for the hegemony of the Central Plains. Advise Jin to step up preparations to prevent Wu from invading.

In 484 BC, Fu Cha, the king of Wu, personally led10,000 soldiers and 3,000 Vietnamese troops to attack Qi. Lu immediately sent troops to help. In the Qi army, Wu Jun's plan to lure the enemy into a tight encirclement, and his division was defeated. The credentials of the head coach and several generals died in the disorderly army. Qi had to plead guilty and make peace. After Fu Cha's victory, he became arrogant and immediately attacked the State of Jin. The State of Jin was ready to repel Wu Jun. Zi Gong made full use of the contradiction between Qi, Wu, Yue and Jin, handled it skillfully, and defeated Qi with Wu Zhijian. With the "knife" of the State of Jin, the prestige of the State of Wu was destroyed. Although Lu's loss is small, he can extricate himself from the crisis.

During the Warring States Period, Su Qin, a famous lobbyist, returned to the State of Yan after successfully implementing the strategy of "uniting the six countries". Mrs. Wen is Wang's mother, young and widowed, but she likes resourceful Su Qin, and they soon have a relationship. Su Qin is worried that if the prince finds out, he will be put to death. He tried to get rid of Mrs. Wen. He proposed to the prince to use double spies in Qi, and hurried to Qi. Both Qi Xuanwang and Qi Min highly valued Su Qin, but they caused the envy of some ministers of Qi. On one occasion, King Min abandoned Su Qin's stratagem and followed Meng Changjun's advice, which saved Meng Changjun from the failure of the other four countries in cutting Qin, so he was rewarded by King Min. People who were jealous of Su Qin thought that Min Wang no longer valued him and sent assassins to the court to assassinate Su Qin. King Min ordered the arrest of the murderer who had escaped. Before he died, Su Qin said to the king of Min, "After I died, you nodded my head and went to the city and said,' Su Qin deserved to die. Whoever kills him will get the reward of 1200 yuan, so that the murderer can be caught. " . King Min did as Su Qin said, and the murderer came to collect the reward and was caught. Then he interrogated the mastermind of the murder, and the king of Min killed them all to thank Su Qin.

Su Qin is a powerful man. After his death, he was able to "borrow" Wang Minzhi's sword, get rid of the murderer and his mastermind, and finally avenge his death. It's really not easy.