Eastern Han Dynasty's National Policy Research

China is a country with long history and multiple nations, how to deal with the relationship between different nations has been a important issue in the history,. East Han Dynasty is an key important period that a united country with multiple nations formed. Researching on the national policy of East Han Dynasty is very meanful for us to review the process of unification of a multiple nations country and to learn from history thus to remain the unification.The author try to analyse and discuss the nation-policy base on existing research. First the author expatiate the development and changes of East Han Dynasty's national policy comparing with those of West Han Dynasty, that include policy changes on southern and western nations and Xiongnu. Secondly, this thesis will analyse the reason of East Han's national policy adjustment. that includes the ruling ideology changes and military revolution and economy unstabiliy etc. At last be not the least the thesis will discuss the influence of the East Han's national policy to different nations as well as to itself.