Hazel mushroom is the fruiting body of the fungus Armillaria. It is one of the few wild fungi that is known by people but still cannot be cultivated artificially. It is a veritable “mountain treasure” and is called “the fourth treasure of the Northeast”. Hazel mushrooms are smooth and refreshing, delicious and nutritious, and are classified as a food in some developed countries. Hazel mushrooms are umbrella-shaped, light earthy yellow, brown when old. Hazel mushrooms grow on the stem base, root replacement, fallen wood and branches buried in the soil from July to August. It usually grows on the hills of Zhenchai in shallow mountains, hence the name “Hazel mushroom”.