Auricularia auricula is a nutrient-rich edible fungus, and it is also a traditional health food and export commodity in China. There are two kinds of fungus that people often eat: one is smooth, black, and the back is gray or grayish brown, called the auricularia (commonly known as wild fungus); the other is smooth, dark brown, half on both sides Transparent, called light fungus. The hairy ears are large, but the texture is thick and tough, not easy to chew, the taste is not good, and the price is low. The light wood ear is soft and fresh, smooth and refreshing, and rich in nutrients. It is a kind of artificial cultivation.