There is a rule in the palace that girls of suitable age must be selected into the palace as maidens. Maiden girls are often the illegitimate daughters of some masters, or the daughters who were born from poor families but could not afford to raise them and want to be discarded. In short, they are usually girls who are abandoned and rejected by others, and are defeated by fate at the beginning of their lives. But these poor girls can live a better life in the palace. Although they are not as wealthy as the princes, they can live better than ordinary people. But the benefits provided to these maids were not given in vain. The maids had to grow up in the palace until they were sixteen years old. After that, they had to fulfill their responsibilities. Whenever any prince fell ill, he had to choose one of the maids and have sex with him until he recovered. Then send the girl back to her family. People at that time were superstitious and believed that this method could be used to remove diseases from princes and spread filth to concubines. At this time, the girl was also called Zhongyi. However, who among the people would marry a woman who has lost her virginity? So people usually end up alone.