2. Draw two crowns on the trunk.

3. Draw all the crowns on the knowledge tree.

4. Draw some pens at the bottom of the tree crown.

5. Draw a pen and wavy lines, and draw a smiling expression under the lines.

Knowledge tree is essentially a hierarchical knowledge map, which expresses the causal relationship or subordinate relationship between all related organizational knowledge in order to achieve an organizational goal. Hierarchical knowledge map is widely used because of its symmetry, good graphics and continuity. You don't have to draw like a tree, it's important to show the knowledge structure clearly. Knowledge tree is very useful for learning.