Pupae are produced in all parts of China, of which the southern production is more, the south is the home of sericulture. The better quality of origin is Jiangsu and Zhejiang and other real estate quality, Guangdong Province, the situation is Shaoguan City, Weng Yuan County production quality is the best. Silkworm pupa has a very good role in enhancing the function of the rich nutrients contained therein. Chrysalis contains a lot of arginine, so its content exceeds that of chicken, fish, meat and eggs. Arginine is an important raw material for eliminating fatigue, improving sexual function and making male sperm protein, which has obvious curative effect on chronic hepatitis, cardiovascular disease, leukopenia and malnutrition. Chrysalis is very rich in nutrition and can effectively enhance immunity. Then chrysalis can not only supplement fat, protein and a variety of vitamins, but also improve brain cell vitality, improve thinking ability. Chrysalis is rich in chitin, the extract of which is named chitosan. Studies have shown that chitin and chitosan have the functions of improving the body's immunity and strengthening the liver.

It can be seen that for 3 high people, eating silkworm pupa has a certain preventive effect, and silkworm pupa has a very good therapeutic effect. Because fried silkworm chrysalis can treat the old ruler and pediatric thin, and silkworm chrysalis oil on high blood pressure, fatty liver, hyperlipidemia and so on have a certain effect. Silkworm pupa can play a certain anti-infection effect, which is a very practical effect on daily life. Silkworm pupa has the effect of inhibiting Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, so the anti-inflammatory and anti-infective effect is better. Silkworm pupa not only has the above effects, but also helps to regulate sugar and fat metabolism. Because the unsaturated fatty acids contained in silkworm pupae have the effect of reducing unnecessary cholesterol in the human body. Silkworm pupa has been proved to have a certain regulatory effect on the body sugar and fat metabolism.

Silkworms spit silk, cocoon 4 days after the pupa. The pupa's body shape is like spinning, divided into three separate segments: head, thorax and fu. The hair is small, with compound eyes and antennae. The thorax has thoracic legs and wings. The drum has nine small segments on the abdomen. The color is brown. Professional practitioners can tell the male and female by the outline of the pupa's abdomen and the brown dots. When a baby silkworm first melts into a pupa, the body color is light yellow, the pupa softens and gradually turns yellow, yellow-brown and brown, and the skin of the pupa hardens. After about 12 ~ 15 days, the pupa becomes soft again, the pupal skin is slightly wrinkled and turns into the color of an earthy brown cocoon, and it turns into a moth. The pupa can be eaten for nutrition.