The Great Wall of China. It was a great project construct in ancient China to defend against the enemy. It is located in northern China and is about 8,851.8 kilometers long. It was founded more than 2,000 years ago during the Spring and Autumn Period. After qin Shi Huang unified China, the Great Wall was formed. During the Han and Ming Dynasties, it was built on a massive scale, so it was the longest ancient project in the world. The Great Wall is one of the greatest architectural projects in the history of human civilization, listed as one of the eight wonders of the world, and a world civilization heritage