Archaeologists have discovered 19 Neolithic tombs and unearthed more than 400 prehistoric items in northeast China's Heilongjiang Province. Most of the items, consisting of jadeware, stoneware and pottery, date back around 9,000 years, according to the provincial institute of archaeology. The site was found in the Xiaonanshan site on Raohe County, along the Wusuli River: a boundary river between China and Russia.
     "Building those tombs could have been hard in light of the construction ability during that period," said Li Youqian from the institute of archaeology.
     The discovery of the tombs proved there was human settlement in that area at that time. According to archaeologists, the abudance of animal and plant resources in the area also made it possible for human beings to live in the area.

Edited from Xinhuanet (22 September 2017)