Yan Zhenqing is a calligrapher in the history of calligraphy. It can also be said that his regular script is one of the most influential calligraphy styles in the history of China. He studied under his mother Yin family, Chu Suiliang and Zhang Xu from childhood, and got the brushwork. He combined the brushwork of seal script with the brushwork of calligraphy, completed the vigorous and broad creation of regular script, and set a good example of regular script in Tang Dynasty. As a master of innovation, Yan Zhenqing's regular script changed the calligraphy style of the early Tang Dynasty, taking seal script as the brushwork, and turned thin and hard into plump, broad and imposing, vigorous and awe-inspiring. This style is the combination of prosperous society and noble personality, and it is a model of the blending of calligraphy beauty and personality beauty. He created the "Yan Ti" with the same reputation as Liu Gongquan, and has the reputation of "Yan Liu Jin Gu". In the history of calligraphy, he, Ou Yangxun, Liu Gongquan and Zhao Mengfu are also known as the four masters of regular script. As Ma Zonghuo said: "The ancient law is in the new idea, and the new idea is outside the ancient law. Vientiane in Tao Zhu contains many advantages, which, like Du Shaoling's poems and Changli's writings, became a book of the Tang Dynasty. "
Regular script before the Tang Dynasty kept the remnants of official script to varying degrees, so it can only be called "real script" or "official script". For example, the stone carvings of Sui Dynasty, the tablet of Longzang Temple, and the epitaph of Dong, although they have obvious writing style of regular script, they have not completely got rid of the writing form of official script. In the early Tang Dynasty, regular script almost changed the structure of official script, such as Ou Yangxun, Yu Shinan and Chu Suiliang. However, in the process of using the pen, the elements in the official script are retained, which can only be the immature stage of the development of regular script. Until Yan Zhenqing, he changed the style of regular script, sublated the advantages and disadvantages of previous calligraphers, and formed an independent calligraphy language-"Yan Kai".