According to the raw materials for making koji, they mainly include wheat and rice. Therefore, they are called Maiqu and Rice Qu respectively. There are many types of koji made from rice, such as koji made from rice flour, red koji or black rice koji made from steamed rice, and rice koji (Aspergillus oryzae).

According to whether the raw materials are matured or not, it can be divided into raw wheat koji and cooked wheat koji. ?

According to the additives in the koji, there are many types. For example, those that add Chinese herbal medicine are called medicinal koji, and those that add legumes are called bean koji (peas, mung beans, etc.). ?

According to the form of music, it can be divided into Daqu (straw bag song, brick song, hanging song), Xiaoqu (cake song) and Sanqu. ?

According to the source of the microorganisms in the koji, it is divided into traditional koji (natural inoculation of microorganisms) and pure koji (such as rice koji inoculated with Aspergillus oryzae, Rhizopus koji inoculated with Rhizopus, and koji inoculated with Aspergillus niger).

2. Classification of distiller’s yeast,

In modern times, distiller's yeast is roughly divided into five categories, which are used in different wines. They are:?

Maiqu is mainly used in the brewing of rice wine;?

Xiaoqu is mainly used in the brewing of rice wine and Xiaoqu liquor;?

Red yeast rice is mainly used in the brewing of red yeast wine (monascus wine is a variety of yellow rice wine);?

Daqu is used in the brewing of distilled liquor. ?

Bran koji, which was developed in modern times, uses purebred mold to inoculate a culture with bran as raw material. Can be used to replace some major or minor songs.

At present, bran koji method of liquor is one of the main operating methods for liquor production in my country. Its liquor output accounts for more than 70% of the total output. ?