长城又叫作万里长城,是中国古代军事防御工程,长城修筑的历史非常悠久,可追溯到西周时期,但那时修筑的长度都比较短。秦灭六国统一天下后,秦始皇连接和修缮战国长城,开始有万里长城之称。明朝是最后一个大修长城的朝代,今天人们所看到的长城大多数是明朝时修筑的。 The Great Wall, also known as the Great Wall, is an ancient Chinese military defense project. The Great Wall has a long history of construction dating back to the Western Zhou Dynasty. However, the length of the building was relatively short. After the Qin Dynasty destroyed the reunification of the six nations, the Qin Shi Huang connected and repaired the Great Wall of the Warring States and began to call the Great Wall. The Ming dynasty was the last dynasty to overhaul the Great Wall. Most of the Great Wall this city saw today was built during the Ming dynasty.