The coastal region of East and South in Haidai region had formed a scale rice raising agriculture during the Longshan period.
到龙山文化时期，海岱地区的南部和东部沿海一带，已经形成了一定规模的稻作农业经济。
2
The Haidai region, which lies in the lower Yellow and Huai River Valley, was mainly a millet planting dry farming area in the early Neolithic period.
地处黄淮下游的海岱地区，新石器时代偏早时期是以种植粟类作物为主的旱作农业区。
3
The sixth chapter is the cultural communication and influences between Heluo and Haidai regions in Xia dynasty and early period of early Shang dynasty.