The party's ethnic theory and policy are: the ethnic policy of the party and the state, and actually the policy about ethnic minorities. It was formulated by the Party and the government according to Marxist ethnic theory, combined with the basic national conditions of China's multi-ethnic groups and the long-standing objective reality of ethnic problems. Its essence is to promote equality, unity, development, progress and common prosperity of all ethnic groups. It is an important code of conduct for people to correctly understand and deal with ethnic issues and an important part of China's policy system. Among them, national unity is the relationship of equality, mutual assistance and friendly cooperation among and within ethnic groups on the basis of common interests, and it is a basic principle of Marxism in dealing with ethnic issues. This is also the basic feature and core content of socialist ethnic relations.