Steps are as follows:

1, first draw the head of the silkworm pupa.

2, then draw the body of the silkworm pupa.

3, and finally color the pupa.

Silkworm pupa, synonym of small bee child, original silkworm pupa, late silkworm pupa. Silkworm pupa is a silkworm spit silk cocoon in the cocoon into the pupa worm. Silkworm pupa is not only delicious, nutritious, or a valuable source of animal protein, but also the extraction of a variety of chemical raw materials.

The silkworm is an economic insect native to China, belonging to the family of Lepidoptera, the great fragrant moth. Silkworm pupa, is the pupa of the silkworm. China's long history of sericulture, is the world's largest producer of fragrant silk, due to silkworm pupae is the main by-product of silk, China can produce more than 500,000 tons of fresh silkworms each year. But because of the lack of technology, for quite a period of time silkworm pupae are basically used as feed, resulting in a certain waste of resources. Silkworm pupa has a high nutritional value and medicinal function, since ancient times has been used as nourishing and strong body ingredients.

Silkworms reproduce by eggs. The eggs look much like fine sesame seeds, about 1 millimeter wide and 0.5 millimeters thick. A female moth can lay about 450 to 500 eggs, weighing about 1 gram. Silkworm eggs are yellowish or yellow when they are first laid, and become russet-colored after 1~2 days, and then change to gray-green or purple after 3~4 days, and then no longer change, which is called fixed color. Silkworm eggs outer layer is hard eggshell, inside is the yolk and plasma membrane, fertilized eggs in the embryo in the development process continue to take in nutrients, and gradually developed into an ant silkworm, it crawls out of the eggshell, eggshell empty after turning white or yellowish.