中国东北，沃野千里，资源丰富，很早以前，就有貊、东胡、肃慎系各族在这里繁衍生息。中国东北地处边疆，与俄罗斯、朝鲜、日本等国毗邻，战略地位十分重要。对于这样一个重要的地区史研究，长期以来却没有得到应有的重视。可以说，在近代以前虽有何秋涛、曹廷杰等人致力于东? In northeast China, there are abundant resources and rich resources. A long time ago, all ethnic groups such as Sui, Donghu and Sushen were flourishing here. Northeast China is located in the borderland, adjacent to Russia, North Korea, Japan and other countries, its strategic position is very important. For such an important study of the history of the region, it has not received due attention for a long time. It can be said that although in the modern era Qiu Tao, Cao Tingjie and others are committed to the East?