Oracle bone inscriptions are the earliest Chinese characters carved on tortoise shells and animal bones. Its fonts vary in size, and the strokes are mostly straight and thin, but also have graceful and curved strokes. The structure is balanced and symmetrical, with alternating density and density, showing an ancient, innocent, vivid and smooth momentum. From the unearthed oracle bone works, we can feel the expression of the three elements of calligraphy, namely the use of pen, structure and composition.