Xu Yifa, the word "Five Family", studied martial arts at the age of twelve, and his martial arts were superb. I like calligraphy and painting since I was a child. My books are mainly true, line and cursive, especially good at list books and cursive. Pay attention to extra-word kung fu and advocate central writing. Only by finding another way and integrating one's lifelong martial arts into one's calligraphy can one make one's writing dull and vigorous. Just like a strong man drawing a sword, he is bold and heroic, full of charm, magnificent and profound in skill, which is beyond the reach of ordinary people. His calligraphy attainments have reached the realm of "the acme of literature is martial arts and the acme of martial arts is literature". Xu Yifa traced back to Huai Su and Erwang. Inspired by Lin Sanzhi's teaching that "the style of calligraphy is light and firm, and the ancients won these three peaks, so that the book and sword can be combined into one, and both rigidity and softness can be combined", Xu Yifa created a unique calligraphy by combining martial arts philosophy with calligraphy skills, which is the second best book in ancient and modern times. Unique, unique, well-known in today's book world. Xu Yifa wrote a unique six-foot "dragon" with one breath and one stroke. Xu Yifa's list is written in an orderly way with yin and yang, and the combination of civil and military affairs is proper; Mo Yun combines rigidity with softness, lifting weights easily.