If you can't draw, you can download high school subjects' high-definition illustrations from Professor Liu Zhuoyuan's Sina blog for reference, but you must draw your own strokes and mind maps, focusing on thinking. The value lies in the thinking process when drawing, so that you can start thinking when drawing and deepen your understanding of knowledge! You can also refer to the academic articles published by thinking visualization Research Institute, such as Quality Management Standard of Subject Mind Mapping and Why Genetically Modified Mind Mapping: