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长城并非始于秦始皇,在秦以前和以后的好几个朝代,都修建有不同规模的长城。据文献记载,最早修筑长城的是楚国。而战国时最后出现的一道长城则是今张家口东北,长约2400余里的燕东北长城。公元前221年,秦始皇吞并六国,修筑了西起临洮、东至辽东、全长5000余公里的长城。这就是名气很大的秦朝长城。 在秦以后的北魏、北齐、隋朝和明代等朝代,又相继修筑长城。如北魏长城自今河北龙关县至内蒙五原县,全长2000余里;北齐长城自今北京昌平至山西忻定县,全长900余里;隋朝长城有两条;一条东起黄河,西至绥州,全长770里,一条西起榆林,东至紫河,全长500余里;明代长城东起鸭绿江,西至嘉峪关,全长12700多里。
The Great Wall did not start with the First Qin Emperor. In the several dynasties before and after the Qin Dynasty, the Great Wall was built with different scales. According to the literature, the earliest construction of the Great Wall is Chu. The Great Wall, which emerged last in the Warring States Period, was now the northeast of Zhangjiakou and the Great Wall of Northeast China with a length of about 2,400 kilometers. 221 BC, Qin Shi Huang annexed six countries, built Linqu west, east Liaodong, a total length of 5000 kilometers of the Great Wall. This is the great name of the Qin Dynasty Great Wall. After the Qin Dynasty, the Northern Wei Dynasty, the Northern Qi Dynasty, the Sui dynasty and the Ming Dynasty and other dynasties, have successively built the Great Wall. Such as the Great Wall of the Northern Wei Dynasty from Longguan County in Hebei Province to Inner Mongolia Wuyuan County, a total length of more than 2,000 years; the Great Wall of the Northern Qi Dynasty from Beijing Changping to Shanxi Xinding County, a total length of more than 900; Sui Dynasty Great Wall has two; , West of Suizhou, a total length of 770, a west from Yulin, purple River east, more than 500 full length; the Great Wall east of the Yalu River in the Ming Dynasty, west of Jiayuguan, a total length of 12700 miles.