China vinegar takes seal script as the form, takes the seal script of vinegar as the main expression element, and expresses vinegar characters in the form of seal script and seal, which highlights the long history of making vinegar in Qingxu and shows the profound connotation of vinegar culture. Qingxu is the authentic birthplace of Shanxi mature vinegar, and fermented vinegar has a long history. As early as 700 years ago, during the Spring and Autumn Period and the Warring States Period, Xu Qingren had brewed vinegar in pots and jars by liquid fermentation, and this technology of brewing vinegar has continued to this day. In the Western Han Dynasty, commercial vinegar workshops appeared in Qingxu. During the Northern Wei Dynasty, the vinegar brewing technology changed from liquid fermentation to solid fermentation, which was a landmark initiative and laid the foundation for the formation of the unique style of Qingxu aged vinegar brewing technology. Qingxu Mature Vinegar ranks first among the four famous vinegars in China (Shanxi Mature Vinegar, Jiangsu Zhenjiang Aromatic Vinegar, Sichuan Baoning Vinegar and Fujian Yongchun Vinegar) for its deep purple color, fragrant taste, heavy quality, mellow sour taste and long aftertaste, and enjoys the reputation of "the first vinegar in the world". Its brewing technique was listed in the first batch of national intangible cultural heritage list in May 2006.