Take it by surprise, attack it by surprise. There is a saying in the original Art of War: "Take it by surprise, take it by surprise. The victory of this division cannot be passed on first. " Attack when the enemy is unprepared, and take action when the enemy is unprepared. This is the secret of military victory and cannot be explained in advance. As one of the famous military laws, "surprise attack" analysis has become a famous military motto throughout the ages. During the Three Kingdoms period, Lv Mengzheng, a famous Soochow player, captured Jingzhou in this way. This World War I made Guan Yunchang, a famous player in the Three Kingdoms, trounce Maicheng, and also dealt a great blow to the strength of Shu. Facing Guan Yu, the little-known Lv Meng first pretended to be ill and asked Lu Xun to guard the land. Lu Xun wrote a letter and gave it to Guan Yu with a gift. Guan Yu opened the book and looked at it. Seeing that it was extremely humble, he paid less attention to Lu Xun, so he relaxed his guard against Soochow and withdrew the main force guarding Jingzhou to attack Fancheng. At this time, seeing that the time was ripe, Lv Meng led 30,000 chosen men and more than 80 clippers. Those who chose to swim dressed as businessmen, all dressed in white, paddled in the boat, but the chosen one fell on the boat. Guan Yu's soldiers guarding the beacon tower on the river mistakenly thought they were businessmen, so he let Lv Meng's fleet all dock. Therefore, Lv Meng took the opportunity to sneak attack the defenders along the river and bought Jingzhou soldiers with huge sums of money, so that Jingzhou soldiers shouted to open the city gate. The soldiers guarding Jingzhou thought they were Jingzhou soldiers, so they opened the gate, so Lv Meng took the opportunity to sneak attack on Jingzhou. It easily captured Jingzhou, the dream of Sun Quan. "Take it by surprise, attack it by surprise" is not only applicable to war, but also can achieve good results if it can be taken by surprise in shopping malls. Tianjin Aluminum Products No.4 Factory made a aluminum pot with a whistle because of "surprise", and the demand for products was in short supply. Aluminum pot is a very common commodity that every household must use. Some people have thought about aluminum pot for a long time, but it is only a small improvement in style, and there is not much novelty. However, Tianjin No.4 Aluminum Products Factory unexpectedly and ingeniously came up with a coup, that is, adding a whistle to the ordinary aluminum pot. When the water boils, the steam blows the whistle to remind people to carry water. This little unexpected innovation makes this "knocking on the bell pot" in short supply. Using the wisdom of "surprise and attack by surprise" in life can often achieve unexpected results. For example, a boy quarrels with his girlfriend, and neither of them wants to admit his mistake first. But this is not the way. So, the boy sent a short message to his girlfriend first, saying that he was going on a business trip and it would take him a few days to come back. His girlfriend also wants to get along, but she just loves face. After seeing this news, I was disappointed, but there was nothing I could do. The next morning, the boy stood in front of his girlfriend with flowers and gave her a big surprise. The small misunderstanding between the two people has also been eliminated, and the feelings have gone further. Here, the boy used a surprise tactic. Surprise is also a universal law of all things in the universe. Materialist dialectics holds that everything in the universe is developing and changing, and only this law of development and change is unchanged. Surprise emphasizes change and opposes patterning. From this point of view, "surprise" is not only a widely used strategy, but also an eternal law.