How did the name of the Forbidden City come from?

Speaking of the origin of the name of the Forbidden City, we should start with the stars in the sky. The ancients believed that the stars in the sky had three walls: Wei Zi Wall, Qiu Wall and Shi Tian Wall. In the middle is the Wei Zi Wall, which is bright and dazzling, and on both sides are the Qiu Wall and the Shi Tian Wall, so people say "Wei Zi is in the middle". In myths and legends, the emperor in the sky is the Jade Emperor, the supreme "Heaven Emperor" who dominates the universe. In addition to his wife and children, Tiandi should also have a "heavenly palace" to solve the sleeping problem. People think that the Heavenly Palace is of course in the center of the sky, so the Ziwei Courtyard has become the place where the Heavenly Palace should be in the eyes of the ancients because of its central position. Therefore, the Heavenly Palace where the Emperor of Heaven lives is also called Purple Palace. Feudal emperors of past dynasties respected themselves as "Di Zi", the son of the Jade Emperor. Since the place where the father lives in the sky is the Purple Palace, the son's palace must be polished, which can be called the Purple Palace for short. The emperor's mansion is heavily guarded, so it is impossible for ordinary people to visit it, otherwise it will be a "forbidden palace" and the palace will become the Forbidden City. The Purple Palace and the Forbidden City are called the Forbidden City together.

In addition, the whole imperial city was built in the center of Beijing according to the pattern of "purple in the middle". The hall of supreme harmony in the palace is condescending, symbolizing the majesty of heaven; Gan Qing Palace and Kunning Palace, two royal palaces, symbolize heaven and earth. The Rijingmen and Yuehuamen on the east and west sides of Gan Qing Palace symbolize the sun and the moon; The zodiac signs in the east and the west symbolize twelve stars. The palace array behind the Zodiac Palace symbolizes the surrounding of stars. Designers have racked their brains to design these architectural patterns symbolizing heaven, earth, sun, moon and stars, just to highlight the majesty and sacredness of the son of heaven.