The Great Wall was built to defend against the northern invaders from Mongolia. Smaller and shorter walls had been built over the years, while Qin Shi Huang decided to build a single giant wall to protect his northern borders. The construction of the Great Wall started in the Qin Dynasty and the following dynasties continued to work on it. Later, the Ming Dynasty rebuilt the wall. Most parts of the so-called Great Wall today was built in the Ming Dynasty. The wall was built by peasants, slaves, criminals, and other people that the emperor decided to punish.
建造長城（the Great Wall）是為了防御來自蒙古（Mongolia）的北方入侵者。多年來，人們已經(jīng)建造了一些較矮小的城墻，但是秦始皇（Qin Shi Huang）決定建造一座巨大的城墻來保衛(wèi)他北邊的疆土。長城始建于秦朝，后續(xù)的朝代進行繼續(xù)建造。后來，明朝重建了長城。我們今天所說的長城絕大部分都是明朝建造的。長城是由農(nóng)民、奴隸、犯人以及皇帝決定懲罰的人建造的。
