Take the net as the key link and see everything. -Huan Tan, a philosopher, Confucian scholar and pianist in the Eastern Han Dynasty, and Huan Tan's New Theory and Separation from Things. Outline: large rope for lifting net. Eye: that eyes in the circle. If you lift the rope, all the meshes will open. "Lu Chunqiu uses soldiers": "If you quote its outline, you will see everything." There is also Zheng Xuan's Preface to Poetry: "Opening the Outline" and? It means the same thing. Later, it is often quoted as "the outline is lifted up." These two sentences are often used as a metaphor for clarity, and also as a metaphor for grasping the main link and driving the secondary link in doing things. Those who plan the main plan must stick to simplicity to prevent complexity. -Su Zhe, a writer in the Northern Song Dynasty, caught the key quote "The Master Book of the King" written by Su Song. Master: Master. Conciseness: Master a concise outline. Royal: Control. F: About dancing. The general idea of these two sentences is: those who master the overall situation must master a concise general outline and control complex affairs. A grand plan and an overall strategy will inevitably involve many things. If you use your strength equally, regardless of priority, you will inevitably fall into trivial matters and have no clue. If we analyze the hierarchy first and grasp the general steel, it will not only be clear, but also outline the whole situation and make the whole situation alive. This is what the ancients said: "Open your eyes to the outline". These two sentences can also be simplified as "keep it simple and avoid complexity", which are mostly used to warn people to grasp the outline and promote comprehensiveness. Read an outline and untie a volume to make it clear to everyone. —— Zheng Xuan, a scholar in the Eastern Han Dynasty, Preface to Poetry: the total rope on the fish net; Lift: lift. As soon as the rope was lifted, all the meshes were opened. Explain the contents of one volume clearly and the meaning of the rest of the articles will be understood. It is a metaphor to grasp the key of things and drive other links. It also means that the article is well organized. Instead of spending a lot of time and energy digging many shallow wells, it is better to spend the same time and energy digging a deep well. -romain rolland, French thinker and writer