Jiuqu () are fermentation starters used in the production of traditional Chinese alcoholic beverages such as Shaoxing wine or Maotai. Also known as a "starter cake" () or "liquor medicine" (酒?, 酒药; ), jiuqu consists of a complex mixture of various yeasts, molds, and bacteria which are cultured on a grain substrate and typically sold and stored in the form of dried cakes or powders.
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