Vinegar is made from starch-containing grains ( sorghum , yellow rice , glutinous rice , indica rice , etc.) as main materials, and grain bran and rice hulls as auxiliary materials, which are fermented and brewed. Generally divided into black vinegar and white vinegar . Black vinegar and white vinegar differ in taste because of the different raw materials added in the brewing process. White vinegar is named for its white color. It is made from pure glutinous rice , which is brewed through koji making, soaking, steaming , saccharification and fermentation, and alcohol fermentation for several months. It is a special cooking seasoning and is used as medicine.