The Great Wall of China is the greatest construction project in the history of human civilization. It was originally built more than 2000 years ago during the Spring and Autumn and Warring States periods, and then connected into the万里Great Wall after the Qin Dynasty unified China. It was also greatly renovated during the Han and Ming Dynasties. Its massive scale and majestic momentum are nothing short of a world miracle. As time passes and people come and go, now when you climb onto the site of the ancient Great Wall, not only can you see the mighty postures of the wall winding through rugged mountains, but you can also appreciate the great wisdom and courage of the Chinese nation in creating its history. The Great Wall is located in northern China, starting at Shanhai Pass in the east and ending at Jiayu Pass in the west, with a total length of about 6700 kilometers, commonly known as the "Ten-Thousand-Li Great Wall". The construction of the Great Wall lasted for more than two thousand years, and according to historical records...