Long black hair is because rice grains are black spots when making wine. How to avoid it: before brewing, if you find that the rice grains are stuck to very fine black particles in the air, if it is determined that it is not long hair, it is recommended to pick up the rice grains and throw them away as soon as possible. Otherwise, when making wine, rice grains with black spots tend to grow black hair. Rice wine is made by mixing good koji with steamed glutinous rice, adding water in proportion, heating, fermenting and precipitating. Rice wine also contains a certain amount of alcohol, and it is best not to exceed 500 grams per day. If the alcohol content is high, it should be reduced. Hyperacidity, gastric ulcer and severe gastrorrhagia are not suitable for drinking. Wonderful use of yellow rice wine: 1. Adding rice wine to hot pot seasoning can increase the mellow and sweet taste. You can't eat rice wine because it is a little hairy. That's harmful bacteria. Eat the deadly rice wine brewing material, white rice 1.2 kg, water 2400cc, No.2 sugar 200 g, distiller's yeast 20 g, the method is 1. Wash the rice a little, add 8 and 1/2 cups of water, cook it in an electric cooker, and then cook it into cooked rice. 2. Grind the distiller's yeast into powder, evenly mix it into the rice, and break up the dough rice. 3. Put the stirred rice into a container, then cover it and let it stand in a cool and dry place (room temperature 20℃? 30℃ is preferred), avoid sunlight. 4. After standing for 72 hours, open the lid, add sugar and stir evenly, then add 2400cc water and stir slightly. 5. Cover the lid and let it stand for 12 days, after fermentation, it becomes wine mash. 6. Put the mash into the distiller for heating and distillation, and the distilled liquor will be mellow self-brewed rice wine after cooling.