Don't eat mushrooms after they have long hair. The long hair of Lentinus edodes is caused by botrytis cinerea infection, which is a fungus and exists in the air in large quantities. Hairy mushrooms will taste worse, lose nutrients and carry a lot of deadly bacteria such as mold and bacteria. It is common for food to have long hair. For example, when the weather is hot in summer, steamed bread stored at room temperature will grow long hair in about 2 days. This kind of steamed bread is rotten and can't be eaten any more. When green hairs are found on mushrooms, they should be discarded immediately. Because this kind of green hair is mold, it is very toxic.