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The watchtowers were typically constructed using [[rammed earth]], a common building material in [[Aridity|arid]] regions of [[Northwestern China]], and during the Han Dynasty. Their walls were thick and tapered, allowing them to withstand [[erosion]] and strong desert winds. Towers were often built at regular intervals to maintain visibility between neighboring outposts, enabling effective communication across long distances. |
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The watchtowers were typically constructed using [[rammed earth]], a common building technique in [[Aridity|arid]] regions of [[Northwestern China]], and during the Han Dynasty. Their walls were thick and tapered, allowing them to withstand [[erosion]] and strong desert winds. Towers were often built at regular intervals to maintain visibility between neighboring outposts, enabling effective communication across long distances. |