Mycelium will be produced on the fermentation surface of the fermented glutinous rice. Over time, the mycelium will turn black, and the wine will be contaminated by the mycelium. It is not recommended to eat it.

The fermented glutinous rice is also called fermented glutinous rice, distiller's grains, rice wine, sweet wine, sweet rice wine, glutinous rice wine, glutinous rice wine, fermented rice wine, and rice yeast. It is made from glutinous rice or rice through yeast fermentation. A flavored food with high calories. The names are different in the north and the south.

Precautions to avoid black spots:

Rice wine needs to be fermented at a temperature of about 30 degrees Celsius (about 80 degrees Fahrenheit), so the wine must be made in summer or winter (heating next to) season.

During the brewing process, contamination by foreign bacteria must be strictly prevented to avoid contamination by mycelium.