(三)我国自古以来就是一个多民族国家。在历史上,各民族间政治、经济、文化联系和友好往来是主流。但历史经验也告诉我们,一旦中央政权衰弱的时候,东北等周边地区往往各自为政,形成与中央政权相对衡的政治局面,加深了民族隔阂、对立,冲突和连年不断 (三) Since ancient times, our country is a multi-ethnic country. Historically, the political, economic, cultural ties and friendly exchanges among various ethnic groups have been the mainstream. However, historical experience tells us that once the central government is in a weak state, the surrounding areas such as the Northeast often make their own way and form a political situation that is in balance with the Central Government, deepening ethnic barriers, antagonism, conflicts and perennial