```mermaid graph TD; A[饼状图例] --> B(类别一) B --> C{值1} B --> D{值2} A --> E(类别二) E --> F{值3} E --> G{值4} ``` This code will generate a basic pie chart visualization. Let me know if you'd like to see examples of other types of Mermaid charts (like bar charts, line charts, or flowcharts). I can also help you customize the appearance of your chart! What kind of information do you want to visualize?