西汉武帝时期,沿黑水、弱水流域,南起(角乐)得(今张掖),北抵居延(今内蒙额济纳旗以北)建立的北部边防要塞和专门设置的张掖郡居延、肩水两都尉府,在反击和防御匈奴进犯,确保内地安全的历史中,曾起过非常重要的作用。在这一区域,从20世纪30年代以来至80年代,不断出土了大量的当时曾使用过,经废置而保存完好的简牍文书,为我们研究两汉时期张掖郡北部边防史,提供了准确而珍贵的原始资料。这些史料,均写在当时通用的材料——简、牍之上。据简牍记载,位于 In the Western Han Dynasty, along the Blackwater and Weakwater Basins, the northern boundary fortress established in the north (now Zhangye) and the northern border of Guyana (now north of Inner Mongolia Ejin Banner), and the specially set-up Zhangye County Juyan, Shoulder Duo Du Wei House, played a very important role in counterattack and defense of the Huns invasion, to ensure the security of the Mainland. In this area, from the 1930s to the 1980s, a large number of simple and clerical documents that were then used, disused and well-preserved were continuously unearthed to study the history of northern border defenses in Zhangye County during the Han dynasty and provide accurate and accurate Precious source material. These historical materials are written on the common materials at that time - Jane, 牍 above. According to brief records, located