Ou Tizi, also known as Ou Tizi, was written by Ou Yangxun, a calligrapher in the Tang Dynasty. Ou Yangxun (557-649), Zishu, was born in Linxiang County, Tanzhou (now Changsha City, Hunan Province) and was a famous calligrapher in the Tang Dynasty. He was proficient in calligraphy, learned from others, and became a family of his own, and was praised as "European style" by later generations. European-style characters occupy an important position in the history of calligraphy in China and have far-reaching influence. European style figures pay attention to horizontal, vertical and square balance in structure. Every word seems to be carefully designed, both rigorous and beautiful. This rigorous structure makes the European-style characters visually give people a sense of stability and majesty. Secondly, the strokes of European characters are delicate and powerful, and they pay attention to starting, turning and closing. Every stroke is full of changes, both rigid and flexible. Fine strokes make European fonts have high artistic value and appreciation. Finally, European-style characters have unique charm, which is both vigorous in the north and gentle and delicate in the south. This charm makes European characters have high aesthetic value.