摘要
The Yangguanzhai ruin in northwest China’s Shaanxi Province The only entire round-moat site for a settlement of the Miaodigou Cultural Period (4,000-3,500 B.C.) The Bronze-Age graveyard in northwest China’s Gansu Province A site of graves of the Qijia Culture (2,000-1,900 B.C.),a civilization from the upper reaches of the Yellow
