Some problems concerning history of Heilongjiang

As early as 175,000,000 years ago even there existed activity of mankind in Heilongjiang region.The ancient national minorities who lived in Heilongjiang region might be divided into three big racial systems,i.e.Sushen in the east part,Huimai in the central part and Eastern Hunain the west part,all of them made important contributions to development and construction of Heilongjiang region,as well to the mixture of Chinese people.Northern Song Danasty was destroyed by Jin is inner affair of Chinese people,because the rotten Dynasty of Northern Song should meet its doom.The resistance to Czarist Russia in Kang-Yong-Qian period of Qing Dynasty had deeds in consolidation of northeast border,but the prohibition of Heilongjiang region enormously restricted its development.