令居是西汉王朝为开辟河西而修建的第一座城堡。可是令居故址究竟在什么地方？多年来，经好多学者专家研究，很难取得共识。我认为，对于历史地理的研究，不能仅靠史料和普通地图关在屋子里划来划去，要以考察自然地理和遗迹遗物，再结合史料多角度研究。史料的疏忽谬误时... Lingju is the first Western Han dynasty to open up the Hexi and built the first castle. However, where is the hometown address? Over the years, many scholars study, it is difficult to obtain consensus. I think that for the study of historical geography, we can not simply draw on the historical materials and ordinary maps in the house, and we should study the relics of natural geography and relics together with multi-angle historical data. When the historical negligence fallacy ...