 At this point Zhukaigou people were agriculturalists, with millet as a main staple, they also had sheep, pigs, and cattle.By the second millennium BC, the Zhukaigou people started using oracle-bone divination, a practice that was closely associated with Shang culture and statecraft.Shang-type artifacts suggest that around the mid-second millennium BCE increased contacts between the local Zhukaigou people and the Shang, or that the Shang culture extended northward.