中文摘要：

长城是历史的产物,也是国家意志的反映。明朝“华夷之辨”思想的变化是明长城修建的内在驱动力;明长城在“守中治边”的方略中发挥其御外制内的功能。明长城具有御外和控内的双向作用,朝廷试图依托长城建立符合王朝理想的统治秩序,因此,明长城在构建华夏族群为核心的政治实践中发挥了重要作用。

英文摘要：

The Great Wall is not only the product of history, but also the reflection of the national will. The change of the thought of ＂ difference between Chinese and barbarians in the Ming Dynasty explains the inner driving force of the construction of the Great Wall. The Great Wall plays an important role in the strategy ＂against the external aggression and keeping internal order. ＂ The Ming Dynasty government tries to establish an ideal rule and order based on the Great Wall. Therefore, the Ming great wall plays an important role in the political practice of the Chinese nation.