A group of correspondents cover the archaeological excavation site on-the-spot at Wangzigang Relics in Lingling District of Yongzhou City, central China's Hunan Province, May 13, 2009. Archaeologists discovered several cultural layers after a few months' work. Shelters, tombs and skeletons of ancient human being were found in the ruins. According to Chai Huangbo, the leader of the archaeological team, the relics can be traced back to the period of late Neolithic Age to early Shang Dynasty (1600 BC-1046 BC), about 4,000 years ago, and it is of great significance to the research of the culture in middle phase of Shang Dynasty. (Xinhua/Hu Minggao)