In ancient times, the distinction between concubines and concubines was very clear. During the Qing Dynasty, the emperor could only have one wife at a time, which was the queen, who was the main wife among the people. Although other concubines were called concubines, they were equivalent to concubines among the people between the emperor and the queen. The children of the main wife were the legitimate children, and the children of the concubines were the concubines. In the Qing Dynasty, this hierarchical concept was very clear. All the emperor's children call the emperor the emperor's mother, which naturally corresponds to the queen's name being the emperor's mother. The emperor's mother is a status symbol and affirmation, and it is easier to understand when she is called the aunt's mother, the biological mother of the children's legitimate children.