Archaeological evidence suggests that early hominids inhabited China between 250,000 and 2.24 million years ago. A cave in Zhoukoudian (near present-day Beijing) exhibits fossils dated at between 300,000 and 780,000 BCE. The fossils are of Peking Man, an example of Homo erectus who used fire. The Peking Man site has also yielded remains ofHomo sapiens dating back to 18,000–11,000 BCE. Some scholars assert that a form of proto-writing existed in China as early as 3000 BCE.