Tomochika attack, language out of the warring states policy. Qin Ce said, "You should make friends far away and attack near. Push your luck, push your luck; A foot is also the ruler of the king. " This is a famous saying that Fan Sui persuaded the king of Qin. At the end of the warring States period, the seven chivalrous men competed for hegemony. After Shang Yang's political reform, Qin's power developed fastest. Zhao Haoqi of Qin began to plot to annex six countries and monopolize the Central Plains. In 270 BC, Zhao Haoqi of the State of Qin was ready to set out to cut Qi. At this time, Fan Sui put forward the strategy of "making friends far away and attacking near" to Zhao Haoqi of Qin, in order to prevent Qin from attacking Qi. He said: Qi is powerful and far from Qin. To attack Qi, the troops had to pass through Korea and Wei. It is difficult to win with few troops; Send more troops, even if you win, you can't occupy the land of Qi. It is better to attack neighboring Korea and Wei first and advance gradually. In order to prevent Qi from forming an alliance with Korea and Wei, Qin Zhao Haoqi sent envoys to form an alliance with Qi. After more than 40 years, Qin Shihuang continued to adhere to the policy of "making friends with Chu", first capturing Korea and Wei, then invading from two wings, breaking through Zhao and Yan and unifying the north; Break the state of Chu and pacify the south; Finally, qi was also cleaned up. Qin Shihuang fought for ten years, and finally realized his wish of reunifying China.