秦直道不经上郡的证据陈静文启见载于司马迁《史记》中的秦直道，是秦始皇在统一六国后为防御匈奴势力南侵而兴修的一条国防大道。关于这条道路的具体走向，早在７０年代中期，著名历史地理学家史念海教授经过实地考察并结合有关文献记载，已将其基本复原清楚（史念海《秦... The evidence of Qin Straight without going to the upper cities Chen Jingwen opens with the Qin straight road contained in Sima Qian’s “Historical Records” as a national defense road to be built by the Qin Shi Huang to defend the southward invasion of the Huns after the reunification of the six countries. As for the specific direction of this road, as early as the mid-1970s, Professor Shi Nianhai, a famous historical geographer, has made clear its basic restoration through field investigation combined with relevant literature records.