The Four Masters of Regular Script are the collective name for the four calligraphers who are famous for their regular script in the history of calligraphy. Also known as the four major regular scripts, the four styles of regular script are: Ouyang Xun (European style) of the Tang Dynasty, Yan Zhenqing (Yan style) of the Tang Dynasty, Liu Gongquan (Liu style) of the Tang Dynasty, and Zhao Mengfu (Zhao style) of the Yuan Dynasty. Ouyang Xun (557-641), courtesy name Xinben, was born in Linxiang, Tanzhou (now Changsha, Hunan). His greatest achievements in calligraphy are regular script, with strong penmanship and unique structure. Later generations called him "European style". Ouyang Xun (European style) of the Tang Dynasty: His regular script is rigorous and powerful, and he is known as "the best regular script among the Tang Dynasty people". His representative work is "Jiucheng Palace Liquan Ming". Yan Zhenqing, (709--785), whose courtesy name was Qingchen, was born in Jingzhao ten thousand years ago. His ancestral home was Linyi, Langya, Tang Dynasty (now Linyi, Shandong). In the history of calligraphy, he is the most accomplished and influential calligrapher after the two kings. His calligraphy was originally written by Zhang Xu, who was one of the four calligraphers of the early Tang Dynasty. Later, he widely recruited others. He changed the ancient method and went against the calligraphy style of the early Tang Dynasty. He used the seal script to transform the thin and hard calligraphy into plump and powerful. The structure is broad and majestic, and the bones are strong and powerful. With a majestic spirit, this style also reflects the prosperous demeanor of the Tang Dynasty and is consistent with his noble personality. It is an example of the perfect combination of the beauty of calligraphy and the beauty of personality. Yan Zhenqing (Yan Ti) of the Tang Dynasty: His regular script is dignified and majestic, with an open momentum, and is known as "Yan Ti" in the world. His representative work is "Duobao Pagoda Stele". Liu Gongquan (778-865), courtesy name Chengxuan, was a native of Jingzhaohua in the Tang Dynasty. He rose to the rank of Crown Prince and Grand Master, and was known as "Liu Shaoshi" in the world. Later generations called them "Yan Liu" together, and they became a model for calligraphy in the past dynasties. His calligraphy is strong, precise and meticulous. In terms of the characteristics of the characters, they are famous for their thinness and strength. The regular scripts they write have strong and charming postures and strong bones. The running script and regular script are the most exquisite. Liu Gongquan of the Tang Dynasty (Liu style): His regular script is clear and powerful, rigorous in structure, exquisite in brushwork, and straight and straight. He is known as "Liu style" in the world. His representative works are "Mysterious Tower Stele" and "Shence Army Stele". Zhao Mengfu (1254-1322), courtesy name Zi'ang, also known as Songxue, was a Songxue Taoist and a native of Huzhou (now Wuxing, Zhejiang). He was good at seal script, official script, Zhen script, Xing script, and cursive script, and was especially famous for his regular script and running script. According to the "History of the Yuan Dynasty," "Meng Fu's seal script, official script, Zhen script, and cursive script are all the best in ancient and modern times, so he is famous all over the world for his books." "Zi'ang's Seal Script" by Yushu of the Yuan Dynasty said: "Zi'ang's seal script, Li, Zhen, Xing and Biancao are the best in the contemporary era, and his small regular script is the first among all Zi'ang's books." His calligraphy style is charming, elegant and coherent. Strict and neat, with sophisticated brushwork, it is known as "Zhao style" in the world. Zhao Mengfu (Zhao style) of the Yuan Dynasty: His regular script is round and elegant, upright and rigorous, without losing the elegance and elegance of his running script. He is known as "Zhao style" in the world. His representative work is "Xuanmiao Temple Rebuilding the Three Gates".