Not all eunuchs in pre-Qin and western Han dynasties were eunuchs; Since the Eastern Han Dynasty, eunuchs have been used. This is because there are many women in the palace, from the empress dowager, imperial concubine, empress dowager, concubines to maids. If waiters are allowed in and out, it is inevitable that the palace curtains will be messy. Therefore, other adult men are not allowed to work in the palace. After castration, the man's reproductive organs lost their sexual function and became neutral. He was a servant of successive dynasties and served the emperor and his family in the court.

Castration means cutting off all male genitals. Eunuchs before the Qing Dynasty didn't just cut testicles. They call it ""

A "baby" is a genital mutilation. Many eunuchs put it in a box and buried it with themselves after death.