We talk up and down, but we don't sing. We sing beautiful songs according to the pronunciation of music, which is music, and music is art. These two examples are easy to understand the relationship between calligraphy and writing. Calligraphy has its specific artistic aesthetic language, and what we call line art refers to the cursive category. The artistic language of calligraphy includes brushwork, calligraphy, pen and ink and composition. Writing is also about brushwork. The purpose of writing is practical. How can it be practical? It is very argumentative and easy to understand, and it can be recognized by the public with a good appearance. Can be simply repeated to achieve the purpose of clear records, and does not require much writing. The ancients generally wrote small letters to meet the needs of exams.