Rice vinegar: It is made from millet, sorghum, glutinous rice, barley, corn, sweet potato, distiller's grains, red dates, apples, grapes, persimmons and other grains and fruits by fermentation. With a small amount of acetic acid, it is ruddy and transparent in color, pure in aroma, mellow and slightly sweet in sour taste, and suitable for dipping or cooking. Rice vinegar is one of many kinds of vinegar with high nutritional value. It is rich in basic amino acids, sugars, organic acids, vitamin B 1, vitamin B2, vitamin C, inorganic salts and minerals.