Paper drawings refer to various graphics on paper, including charts, pictures, schematic diagrams, etc. The functions of paper drawings are mainly reflected in: visual expression: conveying information intuitively through images, enhancing the readability and sense of substitution of paper; Information supplement: use charts to express statistical data information and supplement and support the text content; Demonstration: Some structural diagrams and schematic diagrams can clearly express the author's views or theoretical framework and enhance persuasiveness; Concise and to the point: a chart with a large amount of information can replace a detailed description of hundreds of words and improve the compactness of the paper.