There are many illustrations of brush writing methods, such as "Introduction to Han Xi's Calligraphy" and "Calligraphy Skills in Past Dynasties", and most of them think that "five-character writing method" (such as stroke, hook, grid and touch) is the best writing method, and their explanations are also different. Calligraphy is mainly about how calligraphers use writing brushes. Writing can be divided into narrow writing and broad writing. In a narrow sense, the pen-holding method only refers to the operation of five fingers or the movement of wrists together, which is mainly used to write small and medium-sized fonts, mainly to adjust the posture of fingers and wrists when writing, and involves few parts of the body. In a broad sense, the pen-holding method refers to the coordinated action of fingers, palms, wrists, forearms, elbows, upper arms and shoulders.