1. Prepare a piece of white paper (A4 or A3), a watercolor pen (12 color or more), a pencil and an eraser, Gou Xianbi.

2. Put the paper horizontally and draw a central picture (that is, the theme) in the center of the paper, accounting for about 1/9 of the whole paper.

3. Draw the first branch-the basic information starts from one o'clock clockwise, draw the first main branch, and fill in the keywords (keywords generally do not exceed 4 words, nouns take precedence).

4. Draw the second main branch-national looting. Note: Choose a main color for each branch and use a color for each class.

Step 4: Draw the third and fourth trunk branches.

6. Step 5: Match keywords with some related key charts, which are simple charts.