A tomb dating back approximately 5,000 years, presumed to be the grave of a prehistoric king, has been discovered at a ruins site in central China's Henan Province, with over 350 artifacts unearthed to date.Located in the Wangzhuang ruins in the city of Yongcheng, the tomb covers a total area of over 17 square meters, a super large size back then.The Wangzhuang ruins belong to the middle and late periods of the Dawenkou Culture (4000 B.C.-2600 B.C.), a culture of the late Neolithic Age.Source: Qatar News Agency