In 2014 and 2018,a joint team composed of the Inner Mongolia Hongde College of Arts and Sciences,the In-ner Mongolia Institute of Cultural Relics and Archaeology,the School of Archaeology and Museology of Peking University,and the Dengkou County Cultural Relics Management Office conducted a chronological survey of the rock art in the western section of the Yinshan Mountains.The team reviewed the data previously surveyed by cultural heritage departments in the Niushi Mountain area and discovered 36 front-facing and 9 back-facing petroglyphs on early Neolithic stone tools in the cave.The petroglyphs were dated using AMS carbon-14 at Peking University,revealing an age of 12,674 years before present.This discovery is one of the earliest scientifically dated petroglyphs in China to date.It provides valuable first-hand information for further understanding the origins of early Chinese civilization,studying the inheritance and development of rock art images and proto-writing symbols,and exploring early human observations and perceptions of natural phenomena.