Ouyang Xun's calligraphy was already famous in the Sui Dynasty. By the early Tang Dynasty, his attainments had deepened and his reputation was even higher. It even spread abroad and became the most influential calligrapher at that time.
Ou Shu was originally written by Wang Xizhi and his son, but later changed, forming a special style with "strong, dangerous and sharp", and the font became slender and thin. Slenderness and thinness are the characteristics of the era in the evolution of calligraphy in the early Tang Dynasty. Huang Changrui of the Song Dynasty made this analysis in his book "Dongguan Yulun": "...the writing style of the Han Dynasty is round, vigorous and elegant, and the characters are straight and flat without being elliptical; the ones handed down today are like Zhong Shult ;Li Ming Table gt;...Yi Shaolt;Cao E's stelegt;...and the ancient official script still existed. In the Six Dynasties of Jiangzuo, if Xie Xuancheng...there was still a legacy of King Zhong; in the Chen and Sui Dynasties, the official script was concluded. The calligraphy gradually became more square, and in the early Tang Dynasty, Ouyang was the only one who took the lead in writing, and Yu Yongxing changed his style to become more long-lasting, so his appearance was charming, and later generations imitated it..." It can be seen from this that Ouyang Xun was also a great calligrapher who pioneered the trend of the times.
Although commentators in the past dynasties have different understandings of European books, their praise is the main one. Critics of the Tang Dynasty praised the style of Ou Shu vividly, such as "If a snake is frightened in the grass, lightning will flash in the clouds"; another example is "A diamond's eyes are angry, and a strong man shakes his fist" and so on. Huang Tingjian of the Song Dynasty praised Tang Yanyou for the fact that he obtained several lines of European books, "thought deeply and studied them", and finally became "famous all over the world". Mi Fu described Ou Shu as "... Zhuang Ruo is facing Yue, Jun Ruo is dancing...". However, Zhao Mengjia, a great calligrapher at the end of the Song Dynasty and the beginning of the Yuan Dynasty, still thought that Mi's comments "seem to be unknown in their subtlety", and further affirmed: "Ouyang Xin's book is fresh, powerful and strong, and is one of the best in ancient and modern times!"