That is, the paper feeding angle, pressing force, stroke arc and stroke stroke four degrees. According to the relevant information, calligraphy pays attention to the three principles of four degrees. The four degrees are the angle of entering the paper, the strength of the pressing force, the arc of the stroke and the stroke. The three principles are the beginning, stroke and closing of the stroke. Calligraphy is an artistic form of beautiful writing unique to China and neighboring countries and regions that have been deeply influenced by Chinese culture. It includes Chinese calligraphy, Mongolian calligraphy, Arabic calligraphy and English calligraphy. Chinese calligraphy is a unique form of Chinese characters. traditional art.