In ancient times, the south was regarded as supreme, while the north symbolized failure and submission. The palaces and temples face south, and the emperor's seat faces south. When he became an emperor, he called it "south is the respect"; Defeat, surrender to others, "defeat" and "surrender to the north." It is precisely because the direction of due south is so noble that when people built houses in the past, no one dared to take the direction of due south of the meridian, both east and west, so as not to violate taboos and be convicted.
In addition to respecting the north in the south, in the east and the west, the ancients also took the east as the head and the west as the second. The residence of the queen and concubines is divided into East Palace and West Palace, of which East Palace is the most important, followed by West Palace. Ancestral temples dedicated to ancestral tablets should be built on the east side of the palace. The "master" and "landlord" in modern Chinese also come from this.
In addition to east, west, north and south, there are also high and low points to indicate the direction. The ancient emperor was supreme, sitting north facing south, with the East on his left. Therefore, while advocating the East, the "Left" has also become noble. Wu Dong occupied Jiangdong during the Three Kingdoms period, also known as Jiangzuo. Wen Zuo Wu You's ritual system, the concept of male left and female right, etc. They are all manifestations of respecting the left, and some customs even continue to this day.
For example, the room is the most important part of the residential courtyard. The quadrangles in Beijing are bungalows with no buildings. The most important room in the yard is the main room. The first room is the north room, also called the upper room or the main room. Because the ancestral tablet and the main hall are located in the middle of the main room, the main room occupies the highest position in the whole house, and its width, depth and height are larger than other rooms. Generally, there are three main rooms, the ancestral hall is in the middle, grandparents live in the second room in the east and parents live in the second room in the west. Moreover, the second room on the left (east) of the main house in the old house is slightly larger than the one on the right (west), which is the result of the traditional custom of "left is top". In the past, people had the custom of respecting the left. We often say "Zuo Zu Ancient Temple", "Wen Zuo has no right" and "Men left and women right" all show respect for the left.