In April and May 2009, researchers carried out an excavation in the Guochachang II site which is located on the left bank of Hanshui River's third terrace. The excavation exposed an area of 500 m2 and uncovered 132 stone artifacts in situ as reported in the latest issue of Acta Anthropologica Sinica 2013. The Danjiangkou reservoir area is a pivotal region for human migration and cultural communication between south and north China. The discovery of hominid fossils, such as Xichuan Man, Yunyang Man, Meipu Man, Yunxian Man, and abundant Paleolithic sites in this area highlight its significant position in the...