Friends who are familiar with history and Gong Dou opera must be familiar with the three palaces and six courtyards. They have also heard the names of the East Palace, the West Palace and the Middle Palace, and know that people living in these three palaces are different in different dynasties. The reason why there are no Nangong and Gong Bei is that these three palaces refer not to locations or palace names, but to princes, concubines and queens. However, Nangong and Gong Bei have no names to refer to, and their corresponding properties have not left traces in history.

First of all, the East Palace mainly refers to the palace of the prince, and was once the representative of the residence of the Empress Dowager and the concubines in the harem. Is the East Palace because of one of them? East? The word "Spring" is also called "Spring Palace" or "Green Palace". In some historical works, it is recorded that during the Zhou Dynasty, the residence of the prince was called the East Palace. In the Western Han Dynasty, the bedroom of Empress Dowager Cixi was also called the East Palace, and it was not until the Tang Dynasty that the East Palace gradually became the spokesperson of the prince's residence, that is, Chu Jun.

Xigong is usually the representative of concubines in ancient harem. The Tang Dynasty poet's "West Palace Spring Complaint" describes the grievances of concubines in the deep palace, and also shows that the West Palace was another name for concubines' residence at that time. However, due to different dynasties, people living in the West Palace are also different. For example, Taiji Palace in the Tang Dynasty refers to Xigong, and Xigong in the Qing Dynasty refers to Xianfu Palace, Palace of Gathered Elegance Palace and Yikun Palace.

The middle palace refers to the residence of the empress after Qin and Han dynasties, not just any palace. For example, the palaces in the Western Han Dynasty are different from those in the Eastern Han Dynasty. Weiyang Palace and Jiaofang Temple in the Western Han Dynasty and Changqiu Palace in the Eastern Han Dynasty. Ming Dynasty refers to Kunning Palace and Jingyang Palace, while Qing Dynasty refers to Changchun Palace, so all the queen's bedrooms can be collectively referred to as Zhonggong.

East Palace, West Palace and Middle Palace often appear in historical works and other literary works. From the reference level, they are not the names of a certain palace, but the representatives of princes, concubines and queens in history. There is nothing to refer to, and the Nangong and Gong Bei have no meaning of existence. In addition, there is also a saying that the emperor sat facing south and walked in the north-south direction, which is not suitable for building a palace. Of course, this statement is just a family statement.