Let me start with the Great Wall of China. The Great Wall of China, one of the greatest wonders of the world, was enlisted in the World Heritage by UNESCO in 1987. It is spread across the deserts, grasslands, mountains and plateaus, stretching approximately 8,851.8 kilometers (5,500 miles) from east to west of China. With a history of more than 2000 years, some of the sections of the great wall are now in ruins. It is still one of the most popular place for tourists, because of its architectural grandeur and historical significance. The mystery of the construction of the wall is amazing. The construction of the Great Wall, drew heavily on the local resources for construction materials, was carried out in line with the local conditions under the management of contract and responsibility system. A great army of manpower, composed of soldiers, prisoners, and local people, built the wall. The construction result demonstrates the manifestation of the wisdom and tenacity of the Chinese people. These are the main aspects of this great wonder.