文章指出地理发现是地理学进步和文化发展的重要标志。现在在云南省的东部也发现了不为世人所知的一道两千多年前当地少数民族先民建告的古长城遗址。其地理文化内容之丰富是先前所想象不到的。它可以再现云南古代原住民族历史、地理和文明发展的面貌 The article points out that geographical discovery is an important symbol of the progress of geography and cultural development. Now in the eastern part of Yunnan Province, an ancient Great Wall ruins, which was not known to all people, was proclaimed by ancestors of ethnic minorities over 2,000 years ago. The richness of its geographical and cultural content was previously unimaginable. It can reproduce the ancient Aboriginal history, geography and civilization in Yunnan