Rice vinegar: vinegar made from rice, containing a small amount of acetic acid, usually added when making sour dishes, toning and flavoring. The total acid is 3.5 degrees. Shanxi old aged vinegar is brewed with sorghum, bran, grain bran and water as the main raw material, barley, pea made by the big song as the saccharification fermentation agent, after alcoholic fermentation, and then through the solid acetic acid fermentation, smoked grains, aging and other processes. The total acidity of Shanxi aged vinegar is 9~11 degrees. So it is said that the acidity of aged vinegar is greater than rice vinegar.