Archive excavations in central China have revealed a 5,000-year-old tomb filled with artifacts from the Dawenkou Culture, which may have been the capital of a prehistoric kingdom from 4000 B.C. to 2600 B. C. Experts believe the size of the tomb and wealth of the artifacts indicate the owner was a prehistoric king. The discovery also revealed cultural connections beyond one region and indicates a clear social hierarchy and class stratification within the site. The tomb, M27, was the most prominent find, with about 350 burial artifacts inside including jade ornaments, bone tools, animal remains, and 100 pieces of pottery. The artifacts spanned the eastern and central regions of ancient China and the Yangtze River basin.