跨界民族问题因族类群体分布与主权国家疆界的不一致而生成。在民族国家形成的过程中,由于主权边界的切割作用,或是由于族类群体的迁徙流动,抑或两者因素共同作用,形成了不同时代族类群体与国家疆界复杂交叠的多样组合。有的情况下,一个民族分布于两个国家;有的情况下,一个民族分布于多个国家;有的情况下,跨界民族的一方还建立有主权国家。跨界民族的事实一经形成,原来同一民族的成员便成为了毗邻国界而居的不同国家的国民。跨界民族的成员既拥有着对同一根性的族性认 Cross-border ethnic issues arise from ethnic group disagreements with sovereign state boundaries. During the process of the formation of the nation state, due to the cutting function of the sovereign border, or due to the migration and migration of the ethnic groups, or the combined action of the two, various combinations of complex overlapping of the ethnic groups and the national boundaries in different epochs have been formed. In some cases, one nation is distributed in two countries; in some cases, one nation is located in many countries; in some cases, one of the cross-border ethnic groups also has a sovereign state. As soon as the facts of a cross-border ethnic group were formed, it turned out that members of the same ethnic group had become nationals of different countries living adjacent to their national boundaries. Members of a cross-border ethnic group have both ethnic identities of the same root