Most of the relics, consisting of jadeware, stoneware and pottery, date back around 9,000 years, reports Xinhua news agency.
The site was found in the Xiaonanshan ruins of Raohe county along the Wusuli River, a boundary river between China and Russia, and is expected to support the study of the region's history and culture.
The discovery of the tombs proved there was human settlement in that area at that time.
Abundant animal and plant resources in the area also made it possible for human beings to live in the area, archaeologists said.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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