Ethnicity is a carrier of language and culture. Spatial distribution of ethnic diversity is fundamental for identifying
and reconstructing the migration patterns and evolution histories of cultures and languages. Utilizing the Chinese
4th National Census (1990) data, we investigated the specific time geographical patterns of population and diversity
of Chinese ethnic minorities. As anticipated, results show that Chinese minorities are chiefly concentrated in distant
plateaus and mountains in the southwest, northwest and northeast of China. Further, population density centers of
the 10 major minorities are rather scattered, alternatively dominating at different parts of the country. This study provides
a first comprehensive quantitative test on a prevailing notion of 'six plates and three corridors' on the empirical
clustering patterns of Chinese ethnic minorities. There are more consistent evidences supporting this notion in the
north of China, with the central and southern regions showing more complex patterns, potentially transformed by
processes such as migration, fragmentation, and percolation. The results of this study suggest that a geographical approach
can provide heuristic and complementary information for better understanding of historical social processes.
Keywords: ethnic minority; ethnic diversity; geographical distribution; classification