Wei Zi took care of the emperor drinking tea.

First of all, ladies-in-waiting can leave the palace at a certain age, but eunuchs are different. There is no age limit. Serving the emperor must be selective, smart and loyal, and can find out the temperament of the emperor. Such people are hard to find. If you put a maid-in-waiting to serve the emperor personally, you will definitely not be suitable when you are old and wilting, so eunuchs are the most suitable.

Then it is inconvenient for the maid to do things. General eunuchs need to read the imperial edict to the minister's house. At this time, it is not convenient for ladies-in-waiting, mainly for fear that ladies-in-waiting and ministers will conspire against the emperor. Those who personally serve the emperor need to guard at the door after the emperor falls asleep, which is not convenient for the ladies-in-waiting. When the emperor drinks tea to send things, it will inevitably lead to chaos in the harem for a long time, and it is unbearable for the maids who stay up late for a long time.

Secondly, when the emperor went out, the sedan chair was carried by the eunuch, and the maid-in-waiting didn't have that much strength. There are also some rough and heavy jobs that need eunuchs to do, and the maids are responsible for some simple and fine work. Moreover, eunuchs can't have children, and maids are different. If one day the emperor takes a fancy to a maid-in-waiting and gives birth to a son and a half, it will inevitably lead to a lot of trouble.

Finally, the emperor himself is a lonely position, and few people really talk to him. There are some things that people in the harem can't know. Eunuchs are the emperor's confidants, so they will talk to them occasionally. Because of the emperor's rights, eunuchs dare not go out and talk nonsense. However, if the maid-in-waiting is favored, she is the concubine of the emperor, and her status may change, but the eunuch will not, so the emperor usually lets the eunuch serve him personally.