Recently, reporters learned from the Department of Science and Technology of the Xizang Autonomous Region that the Institute of Vertebrate Paleontology and Paleoanthropology of the Chinese Academy of Sciences participated in the second Tibetan scientific research team and made major archaeological discoveries in the hinterland of the Tibetan Plateau. The team found the earliest known fine stone leaf technology site on the Tibetan Plateau at the third site of the Niadi Site on the south bank of Selinco, Xizang Autonomous Region. This discovery not only fills the gap in the study of prehistoric human culture on the Qinghai Tibet Plateau, but also provides important clues for understanding early human migration and evolution on the plateau. It is reported that the Fine Stone Leaf Technology Site, as one of the richest prehistoric human cultural heritages discovered on the Qinghai Tibet Plateau, has always been of great concern to the archaeological community. These sites represent the large-scale migration and settlement activities of early humans on the Qinghai Tibet Plateau. Despite years of systematic excavation, fine stone leaf technology sites with reliable age data are still relatively scarce on the Qinghai Tibet Plateau, and are rarely found in the hinterland of the plateau. The research team conducted in-depth analysis of the fine stone leaf technology remains in the site through various scientific methods such as technology typology, photoluminescence dating, and carbon-14 dating. The results show that the production of fine stone leaves at the third site of the Neadi site mainly uses two techniques: wedge-shaped stone cores and semi conical stone cores, which are highly similar to the characteristics of fine stone leaf technology in North China during the late Paleolithic era. It is worth mentioning that the age of the third site of the Neadi site has been determined to be 11000-10000 years ago. This time node not only reveals the early activity trajectory of the fine stone leaf technology population in the hinterland of the Qinghai Tibet Plateau, but also provides an important time scale for understanding the evolution of prehistoric human culture on the Qinghai Tibet Plateau. In addition, the research team also conducted in-depth analysis on the development of high-altitude fine stone leaf technology based on molecular biology achievements. They found that the migration of the fine stone leaf technology population into the plateau may be closely related to human long-term living on the plateau and the formation of modern Tibetan people. (New Society)