Ou Yangxun writes well in regular script because he is almost obsessed with learning calligraphy. I happened to see a stone tablet written by Suo Jing, a famous calligrapher in Jin Dynasty. He looked at it for a long time and refused to leave. Just a few steps later, he couldn't help but return to dismount and watch. He can't help but linger. Later, he simply laid a blanket, sat down and pondered it over and over again, and pondered it for three days before leaving.
The representative works of Ou Yangxun's regular script include The Ritual Spring of Jiucheng Palace, Huangfu Birthday Monument, Huadu Temple Monument, and the running script includes Zhong Ni Mengdian Post and Running Script Thousand-character Text. Ou Yangxun is also a calligraphy theorist. In practice, he summed up eight methods of practicing and learning Chinese characters, including Teaching Method, Eight Methods of Using Brush and Thirty-six Methods, and systematically summarized the formal skills and aesthetic requirements of calligraphy, such as using brush, structure and composition, which are valuable materials for future generations to learn from calligraphy theory.