Lajia hosted Qijia culture with millet agriculture and sheep herding. World's oldest noodles from 2000 BCE found in upturned pot. Noodles made from millet plus barley or wheat starches. Inhabitants kept pigs solely for rituals and oracle bones. Proto-porcelain pottery fired at high temperatures using flux-rich clays. Site destroyed by earthquake, flood, or mudflow debate persists. 2016 study claims 1920 BCE earthquake outburst flood linked to Great Flood legend. Critics reject flood timing and lake existence. DNA from twelve house victims shows multiple maternal lineages, no matriliny. Climate cooled sharply 1800-1400 BCE, dooming millet-dependent Qijia. Sheep provided milk, wool, meat – hunted or traded deer. Metal artifacts mirror Central Asia and Siberia styles indicating contact. Stone knives processed grains. Skeletal evidence shows violent trauma in Qijia. Flash floods and mudflows exacerbated by humans likely cause.