The reporter learned from the Shaanxi Provincial Institute of Archaeology on the 12th that the archaeologists' excavation of the Paleolithic site of the night plateau in the Luonan Basin confirmed that the Luonan Basin had human activities millions of years ago. This basin has become one of the few important areas in China with information about human activities millions of years ago, which is of great significance to the study of the origin and early development of ancient human and culture in China. Photo of the excavation of Luonan Night Plateau Site. The Luonan Basin provided by the Shaanxi Provincial Institute of Archaeology is one of the areas with the densest distribution of Paleolithic sites and the largest number of earth-rock products in China. The Asheli industrial stone tools found in the basin, such as hand axes, three-edged hand axes, light axes, and large stone knives, are of great value to the study of human cultural exchanges between the East and the West in the Paleolithic Age. The stone products of the third period of Luonan Yeyuan Site. Located in the west of Luonan Basin, the site of the night tableland provided by the Shaanxi Provincial Archaeological Research Institute is a wilderness type Paleolithic site. The excavation area is located in the southeast of the site, with an excavation area of 500 square meters. The excavation confirmed that the thickness of the site stratum was up to 24 meters, and more than 12000 pieces of earth-rock products were produced, including material preparation, stone core, stone chips, repair tools, fault blocks and debris. According to research and analysis, there were ancient human cultural relics at the Yeyuan site no later than 1.1 million years ago. At that time, the stone tool processing technology of human beings belonged to the simple stone core and chip technology system, and the tools were mainly simple repair scrapers, chopping tools, etc. About 780000 to 250000 years ago, although it is still a simple stone core and chip technology system, the ancient human stone technology has continued to improve, and a new hand pick with one-sided repair and regular shape has emerged in the tools. Single-sided repair pickaxe buried in situ on the 11th floor of Luonan Night Plateau Site. From about 250000 years ago, human activities entered a prosperous period and lasted to about 100000 years ago. During this period, ancient humans left a very rich cultural relics. While the simple stone core and chip technology continued to develop, new tools with the characteristics of Asheli technology, such as hand axe, three-sided hand axe, and thin blade axe, emerged with regular shape and fine repair. Photo of the excavation of Luonan Night Plateau Site. According to the archaeological experts from the Shaanxi Provincial Institute of Archaeology, there are a large number of unearthed relics with rich content, which has preliminarily constructed the development vein of ancient human stone tools technology in the Luonan Basin for millions of years. In addition, this excavation also provided important information for the study of the emergence and prevalence of Asheli technology in China, the migration and diffusion of early human beings, and the cultural exchange between East and West in the Paleolithic Age.