Cai Yong, a writer and calligrapher of the Eastern Han Dynasty, said in his "Calligraphy Theory": "The calligrapher is scattered. If you want to write, you must first scatter your arms." The word "San" releases emotions and emotions in calligraphy (painting). The role of relieving loneliness and expressiveness is fully revealed. Sun Guoting's "Book Book" of the Tang Dynasty said: "The merits of the rituals and music are wonderfully imitated by gods." Calligraphy makes people happy physically and mentally. In fact, it has a profound theoretical foundation and extensive practical basis.