There are many kinds of wild boletus. At present, more than 20 kinds of edible boletus have been found in China, including Boletus variegata and Boletus deliciosa. The main characteristics of Boletus diversicolor and Boletus deliciosa are solitary, large, plump and thick, thick handle, umbrella-shaped cap, reddish brown or yellowish brown cap handle, white to yellowish brown dried products, and rich and pure aroma. Three species, such as red boletus, have certain toxicity, so pay attention to identification when picking to avoid accidental poisoning. From July to September, it can be picked in the mountains 4-6 days after sunny and rainy weather. It is best to pick it after the dew is dry on sunny days, and it is even worse in rainy days.