Since the Zhoukoudian site was discovered in 192 1 year, 27 human fossils and cultural relics of different periods have been discovered. Geological ages range from early Pliocene to late Pleistocene, from 5 million years ago to 1 10,000 years ago. In the long historical years, there are "Beijingers" who lived 700,000-200,000 years ago, early Homo sapiens in the fourth place about 254.38 million+years ago, rural Neanderthals about 38,500-42,000 years ago, and Neanderthals about 30,000 years ago. These fossil sites of ancient humans, ancient cultures and vertebrates are collectively called "Zhoukoudian Site".