Ouyang Xun. Ouyang Xun's "Jiucheng Palace Liquan Inscription Stele" is known as "the ultimate standard of regular script" Ouyang Xun (557-641), courtesy name Xinben, was born in Linxiang County, Tanzhou (now Changsha City, Hunan Province). A minister and calligrapher of the Tang Dynasty, he was the son of Ouyang He, the minister of Chenhuangmen in the Southern Dynasty. During the reign of Emperor Yang of Sui Dynasty, Ouyang Xun served as Dr. Taichang. In the third year of Wude (620), he took refuge in Xia King Dou Jiande and was awarded the position of Taichang Qing. In the fifth year of Wude (622), he submitted to Li Yuan, Emperor Gaozu of the Tang Dynasty, and was awarded the title of Shizhong. He later moved to Yinqingguanglu, where he was appointed as the official, to Shizhong, as the crown prince, and as a bachelor of Hongwen Hall. He was granted the title of Bohai County Male, and presided over the compilation of "Yi Wen" Clustering of Likes”. He died in the fifteenth year of Zhenguan at the age of eighty-five. Ouyang Xun was proficient in calligraphy, and together with Yu Shinan, Chu Suiliang and Xue Ji, he was known as the "Four Great Masters of the Early Tang Dynasty". Together with Ouyang Tong, it is called "Big and Small Ou". Calligraphy found its way into the middle of nowhere, so it was named "European Style". Representative works include: "Jiucheng Palace Liquan Inscription", "Huangfu's Birthday Stele" and "Huadu Temple Stele" in regular script; "Zhongni Meng's Laying Ceremony" and "Thousand-Character Essay" in running script. He has unique insights into calligraphy, and has calligraphy treatises such as "Eight Secrets", "Teaching Secrets", "On Using the Brush" and "Thirty-Six Methods". The "Inscription on the Relics of Zen Master Huadu Siyi", "The Monument of Yu Gonggong Wen Yanbo" and "The Monument of Huangfu's Birthday" are known as "the first regular script in the Tang Dynasty".