摘 要: | China has been a unified multiethnic country since ancient times. Historical records show that as far back as 221 B.C., the State of Qin established the first centralized feudal monarchy in the country, extending its rule over parts of the southwestern regions inhabited by various ethnic groups. During the succeeding Han Dynasty (206 B.C.-A.D. 220), 17 administra- tive prefectures were set up in northwest China,
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