Soak the dried Agrocybe aegerita in cold water. The dried Agrocybe aegerita can be soaked in cold water for 10- 15 minutes, and then it can absorb water and return to a fresh state. However, using hot water for dried Agrocybe aegerita will greatly lose nutrition and taste, so dried Agrocybe aegerita is usually soaked in cold water. Agrocybe aegerita was born on the dead leaves of Camellia oleifera, hence its name. Dried Agrocybe aegerita is rich in nutrients, B vitamins and mineral elements such as potassium, sodium, calcium, magnesium, iron and zinc.