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契丹是我国古代北方民族之一。唐代末年，契丹贵族首领耶律阿保机建立了辽王朝。这是一个显赫的民族。然而，自明朝以来，这个民族突然在历史记载中消失了。他们到哪里去了呢？这一直是一个令史学家困惑的历史之谜。利用DNA技术研究民族源流问题是新兴起的尖端科学。中国医学科
Khitan is one of the ancient northern peoples in our country. In the late Tang Dynasty, Yelv Bajon, leader of the Khitan aristocracy, established the Liao Dynasty. This is a prominent nation. However, this nation suddenly disappeared from the historical records since the Ming Dynasty. Where did they go? It has always been a mystery of history that puzzles historians. Using DNA technology to study the origins of the nation is a newly emerging cutting-edge science. Chinese medicine department