the great wall
the great wall of china is considered to be the only man-made project visible from the moon. although it was once thought to have been built entirely during the qin dynasty between 221 and 208 bc, it is now believed to have been started earlier.
the 15-foot-high, 25-foot-wide, 1,500-mile-long structure was undoubtedly built to keep out invading enemies. to the common people of the empire, who had been forced to build the wall, it was not worth it, however. the wall, and other public works completed by the qin dynasty,had caused great losses of wealth and human life in the country. as a result,an angry population rose up in rebellion against the qin dynasty,and in 207 bc the han dynasty began.
because of its rich history and magnificent appearance,the great wall attracts tourists, scientists, and historians to this day and will continue to do so for generations.
長城
中國的長城被視為惟一能從月球上看到的人造工程。人們曾認為長城全部修建於公元前22l到208年的秦朝，但現在人們相信長城的修建要開始得更早。
修建這一高15英尺，寬20英尺，長1500英里的建築無疑是用來抵禦外敵入侵的。但對帝國中被迫修建長城的百姓而言，實在不值得。秦代建築的長城再加上完成的其他公共工程給這個國家的財產和生命帶來了巨大損失。結果，一群憤怒的人揭竿而起反對秦朝，公元前207年漢朝開始。
長城有著悠久的文化和宏偉的外觀，因此直到今天還在吸引著旅遊者、科學家和史學家前來參觀，而且在今後許多年仍會如此。