第六章，河洛与海岱地区夏代至早商早期文化的交流与影响；
The sixth chapter is the cultural communication and influences between Heluo and Haidai regions in Xia dynasty and early period of early Shang dynasty.
关于海岱地区新石器时代的玉器，此前已有学者从不同角度作过研究。
Some scholars have study the jades in Neolithic period in Haidai region from different angles, but few analyses on the origin of raw material of jade and technology.
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。
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.
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