According to historical records, after Qin Shihuang chose to build a mausoleum on Mount Li, he built Mount Li soup next to Mount Li and built a palace where there were hot springs. During the Northern Zhou Dynasty, Lishan Hot Spring was built into a royal palace, with grand regulations and originality. After the construction and beautification of Northern Wei, Northern Zhou and Sui Dynasties, the scale of Lishan Palace is unprecedented. Splendid halls, far away from each other, painted attic tables, resplendent, natural mountain scenery, hot spring smoke, pines and cypresses, brilliant mountain flowers, like tapestry-like embroidered garden scenery, have become a fairyland on earth. However, it was not until the Tang Dynasty that the Lishan Hot Spring Palace officially had the name of Huaqing Palace, and it also had the nature of a vice capital or a tourist capital. In 747 AD, Emperor Xuanzong of the Tang Dynasty changed the Hot Spring Palace into Huaqing Palace, and at the same time ordered large-scale construction, built pavilions, temples and laid out beautiful gardens. At this time, we can see the luxury and grandeur of Huaqing Palace through Luocheng (Miyagi), and the important buildings of Huaqing Palace are laid out here. The city is divided into four gates, with the south and north gates as the central axis, and the palace wall is divided into three areas. In the east, there are Ursa major Eta building, Feishuang Hall, Jiulong Hall and Liyuan. In this pear garden, Tang Xuanzong and Yang Guifei taught their disciples to practice in the pear garden, which is also an important part of China opera. There are money bottles, back halls, Prince's Soup, Shaoyang Soup and Shangshi Soup in the central area. Outside the north gate, there are buildings such as Guanfeng Building, Chongming Pavilion, Cockfighting Hall, Songtai and Empress Dowager Hall. Outside are temples, and to the east are stadiums, vaulting platforms, chicken farms and other recreational facilities. Outside the winding palace wall, there is a mansion given to Mrs. Yang and Qin by Emperor Xuanzong of the Tang Dynasty, as well as a watermelon garden, a hibiscus garden, a litchi garden and a flower stand. At this time, Huaqing Palace covers an area of 1300 mu, which shows that the luxury of Huaqing Palace at that time was extraordinary. According to records, during the reign of Emperor Xuanzong of Tang Dynasty, he visited Huaqing Palace 49 times, especially in October of the lunar calendar in 740 AD (the 28th year of Kaiyuan), when Emperor Xuanzong and Yang Guifei first met in Huaqing Palace. Before conferring the imperial concubine, Emperor Xuanzong of Tang Dynasty was infatuated with Yang Guifei and neglected government affairs. In the winter of 75 1 year (Tianbao Decade), Emperor Xuanzong of the Tang Dynasty and Yang Guifei lived in Huaqing Palace for 96 days. At this time, Huaqing Palace became the temporary office of the emperor and the temporary political center of the Tang Xuanzong era. However, just after the Anshi Rebellion, the palace, which was in full swing, went into decline. After the Tang Dynasty, Huaqing Palace began to fade out of the sight of literati due to the erosion of war and the wind and rain of years. Since then, there are relatively few records about Huaqing Palace. By the time of the Republic of China, Huaqing Palace had only a circular garden (Huaqing Pool), and there were only more than 20 buildings and landscapes, including five halls built during the Guangxu period of the Qing Dynasty (1875 ~ 1908). 1936 After the An Incident, the Binjian Pavilion was built here. 1955, Huaqing Pool was expanded by the Construction Engineering Bureau of Shaanxi Provincial People's Government, but it was only 620 square meters at that time, and Guifei Pool was rebuilt on 1956. In the following decades, the continuous expansion gave Huaqing Pool its present appearance, but its area was only over 30 mu, and most of the ruins of Huaqing Palace were occupied by private houses and some units.