64 years ago today, on December 11, 1961 (November 4, 1961 lunar calendar), the ruins of Chang'an City in the Tang Dynasty were excavated. In December 1961, the ruins of a one-million-population metropolis in our country more than a thousand years ago were excavated. This metropolis is is the famous Chang'an Kyoto in the Tang Dynasty. The scope of this city includes the urban area and suburbs of present-day Xi'an City. At the end of the Tang Dynasty, it was badly damaged and finally became a ruin. Before liberation, many scholars tried to excavate the ruins of this Tang City, but they were unsuccessful due to restrictions. In 1957, the Archaeological Research Institute of the Chinese Academy of Sciences organized a special Tang City excavation team and began a large-scale excavation work. After more than four years of hard work, the general appearance of the site has now been revealed. From the excavated ruins of the urban layout, palaces, streets, and squares, one can imagine the grand occasion of thousands of households and cars and rivers in the city at that time. The results of excavation and survey prove that the surrounding area of Chang'an City in the Tang Dynasty is more than 70 miles, which is more than five times larger than the old city of Xi'an today (that is, the city site of Xi'an in the Ming and Qing Dynasties). The whole city is divided into three parts, the outermost is the outer Guo City, the middle is the northern part of the imperial city, and the northern end of the imperial city is directly in the middle of the palace city - the place where the emperor lived. There are twelve city gates on the outer Guo city wall, and the base sites of eight city gates have been excavated so far. Many vertical and horizontal streets neatly divide all areas of the city except the palace city and the imperial city into 108 rectangular workshops. On both sides of the excavated site of Xishi Beidajie, a dense collection of building foundations has been found. Here, many of the walls are closely connected, and most of the two houses have brick sewers that lead to the ditches next to the street. There are also the remains of stoves and wells, as well as Tang Dynasty bricks, fragments of ceramic utensils and remnants of stone carvings of cattle, lions, Buddhas and other ornaments. The archaeological excavation team has made the Daming Palace the focus of the excavation. Now they have surveyed the scope and distribution of the Daming Palace. They have excavated five city gates and city walls, two large palaces, Linde Hall and Hanyuan Hall, and the remains of many buildings in the palace, including the pavilions, ponds and aqueducts. The entire Daming Palace site covers an area of about 15 square miles, more than twice the size of the Forbidden City in Beijing. The Linde Hall is one of the largest halls in the Daming Palace, built on a platform made of rammed earth. There are more than 100 columns in the hall, which shows the scale. Archaeologists also found a large number of fine flower bricks and stone carvings used in construction in the ruins of the Daming Palace. The architecture of the Daming Palace shows that the architectural art of the working people at that time had reached a rather high level.