Little do people know that retreat is not the abandonment of armor and weapons on the battlefield, not the fear of difficulties, not the cowardice of character, nor the innate lack of ability... On the contrary, retreat is the spirit of "Three thousand Yue soldiers can swallow Wu", the courage of blood to avenge the world; it is the wisdom of Duke Wen of Jin who retreated three times, and the heroism of Li Bai who "laughed at the sky and went out". Because of retreat, Cao Cao returned to the city in anger over the murder of Dian Wei; because of retreat, Zhuge Liang sat on the Wolong Ridge and talked about domestic affairs and sang songs of magnanimity... In this way, history lost a foolish minister who died for disobeying the emperor, but gained a famous prime minister who pushed history forward; in this way, history lost a life-and-death duel that shook the world, but gained the prosperity of the Wei Kingdom; in this way, the world lost a literati who was busy looking for a job, but gained the image of a military god who will be admired for thousands of years. Retreat is not a simple retreat; nor is it the goal itself, but the wisdom to achieve the ultimate rapid progress.