1. Confirm the central theme. Draw a rectangle in the middle of the blank space of the white paper. This rectangle is the central theme of our mind map. After drawing, fill in our theme.

2. Build a secondary theme, divide the modules, arrange them well, and fill in the content at a certain distance.

3. Improve the content of the brain map, classify it according to the secondary themes, write down their corresponding knowledge points on white paper, and then use lines to correspond to their secondary themes.