Vinegar is a traditional condiment in the major cuisines in China. According to the literature, the history of vinegar brewing is more than 3,000 years, which can be generally divided into two categories: solid-state fermented black vinegar, liquid-state fermented red vinegar and white vinegar. Vinegar is mainly fermented from glutinous rice, wheat, sorghum, etc. It contains amino acids, lactic acid, organic acids and other components. The famous vinegars in China include Zhenjiang balsamic vinegar, Shanxi aged vinegar, Sichuan Baoning vinegar and Tianjin Duliu aged vinegar.