Ann's "A Brief Training of Huainan Zibing": "Use the way of fighting, treat it with softness, meet it with strength, and use it with weakness." The way to fight is to let the enemy see that you are very tired and weak, and only when the enemy attacks can you find that you are actually very powerful.

Liu Mingji's Hundreds of Battles: Weak War: "If the enemy is outnumbered and the enemy is strong and weak, we should raise more flags and build more stoves to show that we are stronger than the enemy, so that we can measure the strength of our numbers, and then the enemy will not underestimate the enemy and fight with me, so that I can walk fast and the whole army will stay away from harm." Therefore, there is the idiom "defeating the strong with the weak".