Pure mycelium infiltrated from smoked white fungus ash requires hybridization before it can be used to produce parents and cultivars. The meeting method is as follows: First, inoculate the fungus Tremella fuciformis on the experimental medium, and cultivate for 5-7 days under the environment of 23 ℃ ~ 25 ℃. After the white fungus mycelium grows to the size of soybean, a small amount of gray mycelium is added and cultured at the same temperature for 7-10 days. Gray mycelium is the original strain when it spreads in the test tube.