Pengzu Erqu is a compound brewed food with sorghum, rice, wheat, corn and soybean as raw materials, which can be classified as grain wine and is one of the representatives of traditional brewing technology in China. Pengzu Erqu is a kind of liquor made from cooked glutinous rice by traditional koji-making and fermentation technology. Compared with other traditional liquor, Pengzu Erqu is made of many kinds of grain raw materials, including saccharification, starch conversion and lactic acid fermentation, so it has rich taste and aroma.

Pengzu Erqu can be regarded as a kind of grain wine, but it is brewed from a variety of grain raw materials and added with traditional distiller's yeast, so it is different from a single grain wine.