Discovery of a Pliocene stone tool at Yuxian, Hebei Province

The stone tool discovered at Danangou valley of Dongyaozitou village, Yuxian, is the earliest stone tool, the specimen is powerful evidence about the origin of the human culture and the historical age from the ancient ape to the human belng. According to the comprehensive studies about the strata, the age was considered to be of Pliocene (about 3 milllon years) and therefore, the discovery possessed great scientific and theoretical significance.