There is a poem in "The Book of Songs" that says, "The borer has a son, and the cockroach carries it away." A borer is a caterpillar, a larva of an insect; a borer is a wasp, a type of wasp. It can be seen from the poem that as early as 3,000 years ago, people had observed the habit of the slender-waisted wasp to capture the larvae of other insects. What is the use of catching larvae? There is no explanation in the pre-Qin works. Later scholars had various explanations for this. Some scholars, such as Yang Xiong in the Han Dynasty, believed that when the slender-waisted bee caught a dead caterpillar, it would chant a curse on it: "Like me! Like me!" Over time, the dead caterpillar would become Became a slender-waisted wasp. Later, many scholars believed Yang Xiong's statement. This is obviously due to careless observation and lack of understanding of the nature of things. However, there are some scholars who do not believe Yang Xiong's opinion. Through personal investigation, they gradually solved the secret of "the borer has a son, and the cockroach bears it".