The Great Wall Heritage Sites

The Great Wall is an ancient defense project with the longest building time and thelargest amount of

work in the world. Since the 7th or 8th century B.C., the Great Wallhad been built for more than 2,000 years, and it is mainly distributed in northern andcentral China, with a total length of more than 5,000 kilometers. Therefore, the GreatWall has a construction history of more than 2,000 years and covers a large area ofland. Such a huge project is the only one of its kind in China, and even the whole world.Therefore, it had been listed as one of the seven wonders, including the RomanColiseum and the Leaning Tower of Pisa from the Middle Ages.