section_path: Course/Han Great Wall
section_name: Han Great Wall
paragraph_text: Han Great Wall
  
  Han fortifications starts from Yumen Pass and Yang Pass, southwest of Dunhuang, in Gansu province. Ruins of the remotest Han border posts are found in Mamitu (t 馬 迷途, s 马 迷途, Mǎmítú, l "horses losing their way") near Yumen Pass.