According to records, not all eunuchs in the pre-Qin and Western Han Dynasties in China 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. For example, the officials of the Qin Dynasty were favored by the Empress Dowager.
The eunuch system originated in the pre-Qin period, and there are records about eunuchs in The Book of Songs, Zhou Li and Li Ji. Most of the Zhou Dynasty and vassal states set eunuchs. Qin eunuch _ _ was favored by the Empress Dowager, with a high position and a long letter. Eunuchs are generally held by people with humble status. Its source is either filled by criminals sentenced to imprisonment or selected from the children of the people. After Qin and Han Dynasties, the eunuch system became more detailed. As a special political force, eunuchs had a great influence on the political situation of many dynasties.
According to research, the first eunuch in China feudal society was named Wu Tengyu, a native of Shangrao, Jiangxi. Eunuch has many names in China ancient books, such as middle official, eunuch, official, inner official, eunuch, middle-trickling water, inner vertical, middle-noble and so on.
Eunuchs were called "eunuchs" after the Sui and Tang Dynasties, and the higher-ranking internal supervisors were called "eunuchs". Tang Gaozong changed the palace province to the imperial palace, and took eunuchs as eunuchs, with less supervision. Later eunuchs were also called eunuchs. In the Ming Dynasty, eunuchs became more and more powerful, so people regarded all eunuchs as "eunuchs" and eunuchs became synonymous with eunuchs.