I. Ou Yangxun

Ou Yangxun was born in Linxiang County, Chenzhou (now Changsha City, Hunan Province). Tang Dynasty minister, calligrapher, son of Ouyang Gui, assistant minister of Chen Huangmen in Southern Dynasties. When Yang Di was in Sui Dynasty, Ou Yangxun became a doctor too often. In the third year of Wude (620), he took refuge in Dou Jiande, the king of Xia, and was named Taichangqing. In the fifth year of Wude (622), he joined Tang Gaozu in Tang Gaozu and became a teacher.

Ou Yangxun was proficient in calligraphy, and he was called "the four great masters in the early Tang Dynasty" with Yu Shinan, Chu Suiliang and Xue Qi. Together with Ouyang Tong, it is called "Greater Europe". Calligraphy is in danger in Pingzhong, nicknamed "European style". The representative works are: The Ritual Spring Inscription of Jiucheng Palace, Huangfu Birthday Monument and Huadu Temple Monument in regular script; Running script "Zhong Ni Montitie" and "Running script thousand words".

Second, Yan Zhenqing.

Yan Zhenqing, nicknamed Xianmenzi, nicknamed Fang Ying, was born in Linyi, Langya, and Jingzhao was born in Wannian. Yan Shigu V was a famous official, calligrapher and secretary supervisor in the Tang Dynasty. He was once a famous painter such as Sun and Situ. Yan Zhenqing, a native of Langya Yanshi, was a scholar in the 22nd year of Emperor Xuanzong of Tang Dynasty (734). He used to be the censor and an assistant in the temple.

Yan Zhenqing's calligraphy is exquisite and good at it. Chu Suiliang, a beginner, studied under Zhang Xu and got his brushwork. Its regular script is dignified and majestic, and its running script is vigorous and powerful, which has created a "Yan style" regular script and has a great influence on later generations. Together with Zhao Mengfu, Liu Gongquan and Ou Yangxun, they are also called "four masters of regular script". Together with Liu Gongquan, they are called "Yan Liu" and "Yangu". Good at poetry.

Third, Liu Gongquan.

Liu Gongquan was born in Jingzhao Garden (now Yaozhou District, Tongchuan City, Shaanxi Province). An official, calligrapher and poet in the middle Tang Dynasty, the son of Liu Ziwen, the secretariat of Danzhou, and the younger brother of Liu Gongchu, the minister of war. Liu Gongquan, a native of Liushi, Hedong, was the champion of Yuanhe in Tang Xianzong in 808. As a scholar for the first time, he entered the Li Painting and Calligraphy Institute.

Liu Gongquan is good at Ci Fu and calligraphy. As a beginner, Wang Xizhi visited famous calligraphers in the Tang Dynasty, learned from Yan Zhenqing, absorbed new ideas, and created his own "Liu Ti", which was as famous as Yan Zhenqing in strength and strength, and was called "Yan Liu", and was later known as "Yan Gu". Known for regular script, Ou Yangxun, Yan Zhenqing and Zhao Mengfu are also called "four masters of regular script".