燕秦长城,指的是战国时期燕国所修的北线长城,以及在秦统一后对其修缮,使其成为秦统一长城的一部分。战国时期,燕国为了防御北方少数民族的侵扰,修筑了燕北长城。与之相对的还有拱卫燕下都的燕南长城。秦统一之后,为了防范匈奴的南下,将战国时期本国以及北方其他诸侯国修筑的长城连接起来,燕北长城也成为其中 The Great Wall of Yan and Qin, referring to the Great Wall of the North Line, which was built by Yan State during the Warring States Period, and repaired after the reunification of Qin made it a part of the Great Wall of Qin Dynasty. During the Warring States Period, Yan State built Yanbian Great Wall in defense of the invasion of ethnic minorities in the north. In contrast, there are Yan’an Great Wall under the cover Wei Yan. After the Qin unification, in order to prevent the Huns southward, the Great Wall of the Warring States period, as well as other vassal countries built in the northern part of the country, the Great Wall of Yanbei also became