Calligraphy in a narrow sense refers to the methods and laws of writing Chinese characters with a brush. Including writing, calligraphy, stippling, structure, layout (distribution, lines, composition) and so on. For example, the pen refers to the palm and the five fingers are Qi Li; The pen carrying center is unfolded; Stippling is the same as a pen; The structure is shaped by words and echoes each other; The distribution is intricate, the density is appropriate, and the virtual and the real are born together, and the whole chapter is full of gas fields; Every word is ancient for literacy, and every word is big and small, and high is not as good as low. Calligraphy in a broad sense refers to the writing rules of language symbols. In other words, calligraphy refers to writing with its brushwork, structure and composition according to the characteristics and significance of words, making it a beautiful work of art. With the development of cultural undertakings, calligraphy is not limited to using brush and writing Chinese characters, but its connotation has greatly increased. For example, from the use of tools, there are many kinds of hard pen and cursive calligraphy, such as writing brush, hard pen, computer instrument, spray gun branding tool, carving knife, engraving machine and daily tools (mainly hardware and daily tools with hard texture that can be used for writing).