1. From coarse to fine, closely connected. The main line of mind map is from coarse to fine, so it is drawn with double lines. The connection between the trunk and the central figure is thicker, and it becomes thinner when it is connected with the secondary branch, and the end becomes a point; The thick trunk is the main part, and the thin branches are the details, so the main and auxiliary parts can also be seen through the thickness, so ... 2. The layout is reasonable and the ends are smooth. When drawing the trunk, you should start the pen properly, and the inclination should not be too high or too low. The trunk and branches are represented by lines, and the two ends should be smooth because there is room for keywords. When drawing a trunk, the layout should be reasonable. Usually the starting line of the trunk is about 45 degrees, and the smooth part at the end is about 20 degrees ... 3. Clockwise order. When drawing the trunk, you should follow the clockwise order, which is generally the order of upper right, lower right, lower left and upper left. When reading a mind map, you should also look at the structure in the order of drawing.

Logical thinking refers to the way or form of connecting and organizing the content of thinking. Thinking takes concepts and categories as tools to reflect cognitive objects. These concepts and categories exist in the human brain in a certain frame form, that is, thinking structure. These frameworks can organize different categories and concepts together, thus forming a relatively complete train of thought, which can be understood and mastered to achieve the purpose of understanding. Therefore, thinking structure is not only a cognitive structure of human beings, but also a structure of human ability to grasp objects by using categories and concepts.

The main contents of logical thinking include: subject, definition, classification, relationship and order. The subject defines who is the main and who is the auxiliary; Clearly define what is the theme; Classification defines categories divided according to different classification rules; The relationship between subject and object, and the relationship between different types of subjects, including relevance, inclusion, genus, attribution, etc. Order defines the order of each process.