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https://yuyencia.org/2017/12/07/%e5%94%90%e4%bb%a3%e5%a5%91%e4%b8%b9%e7%be%81%e7%b8%bb%e5%88%b6%e5%ba%a6%e4%b8%8e%e5%b9%bd%e5%b7%9e%e5%a5%91%e4%b8%b9%e7%9a%84%e5%bd%a2%e6%88%90/
唐代契丹羁縻制度与“幽州契丹”的形成