What is the relationship between the construction of Daming Palace in Tang Dynasty and the Feng Shui of Chang'an City?

In ancient China, spiritual beliefs played a very important role in people's daily lives, and they strived to pursue the ideal state of interaction between heaven and man, and the unity of heaven and man. This idea was reflected in the planning and layout of the capital, adding to the mystery of the emperor's divine power. Ancient city planning was deeply influenced by the traditional Chinese cultural thought of "the unity of nature and man" and often contained the lofty sentiment of "transforming the natural image of heaven and earth into the image of the human heart." It has the urban planning concept of "saving the world and the earth into every square inch". Cities on earth are often reflections of heaven, making cities a symbol of the universe. This is especially true in the capitals where the "Emperor" lives, and the capital Chang'an, a masterpiece on earth, is no exception. In fact, if you look at the height of Liupo, the terrain gradually decreases from south to north. Then Miyagi's position is relatively low. There was another reason why the palace was not placed at the highest point. According to the position of the stars in the sky, the most noble Ziwei Palace is located in the center of the north sky. It has the North Pole as its center, and there are 15 stars surrounding it in the two vassals of the east and west (ie, left pivot and right pivot). The ancients believed that Ziwei Palace is the seat of the Emperor. Ziwei Palace means the imperial palace. The emperor is the Son of Heaven, and the monarchs on earth should correspond to the stars in the sky. Therefore, the palace can only be placed in the center of the north. Moreover, there is the Wei River to the north, so from a defense perspective, it is the safest.