The silkworm chrysalis emerges into a moth, also known as a male moth. The male moth has unique physiological characteristics. It can mate continuously for 8 hours on the first day it becomes a moth, and then it is stored at low temperature and can be taken out again the next day. Continuous mating for 8 hours, and ensure a live sperm rate of more than 95%. Such strong fecundity is rare in the biological world. Li Shizhen of the Ming Dynasty called the moth male a divine insect in his "Compendium of Materia Medica" and believed that this insect had magical effects of nourishing the liver and kidneys, aphrodisiac, and anti-aging.

Scientific research shows that male silkworm pupae are rich in brain hormones, male hormones and other nutrients, which have significant effects on improving human immunity and enhancing sexual function. Among them, brain hormones have excellent tonic effects on middle-aged and elderly people. Taking a certain amount of brain hormones can promote cell growth, stimulate dermal cell division, control specific protein synthesis, and enjoy youthful vitality. Male silkworm pupae are rich in protein, fatty acids, vitamin B12, nucleic acids, zinc, iron, calcium, phosphorus, selenium, germanium and other trace elements, of which essential fatty acids account for 43%. Essential fatty acids nourish the kidneys and strengthen yang, and are the precursors necessary for the synthesis of human prostaglandins.