1. After selecting a theme, you can collect relevant information by reading relevant books, documents, investigation and research, and get to know the relevant knowledge and historical background of the theme, as well as the current research progress and application practice.

2. On the basis of collecting data, determine the elements of the theme, such as picture composition, color matching, expression techniques, and the theme and emotion to be expressed.

3. According to the theme elements, design sketches and try different compositions and expressions to achieve the best expression effect.

4. On the basis of the design sketch, further determine the details, such as lines, colors, light and shadow, as well as text descriptions and comments.

5. According to the design sketch and the determined details, complete the illustration of traditional Chinese medicine, and modify and polish it to achieve the best visual effect and artistic effect.