In ancient times, writing was called "book", and "calligraphy" refers to the rules of writing Chinese characters with a brush. The reason why calligraphy can become an art is related to the pictographic characteristics of Chinese characters and the use of "Four Treasures of the Study". Like Chinese painting, it uses pen, ink, paper and inkstone as tool materials, which can show the beauty of strokes, structure and composition of Chinese characters, and even the shade of ink can show the special beauty of ink color. The written words can vary from person to person and are ever-changing. The main fonts are regular script, running script, cursive script, official script and seal script. Calligraphy and Chinese painting have similar aesthetic concepts, that is, focusing on expressing subjective feelings and artistic charm. Therefore, some people think that "calligraphy and painting are of the same origin" in art, and calligraphy is a unique traditional art in China, and it has also become an important part of "mysterious" oriental art in the world art treasure house.