The Great Wall I*** has 21,196.18 kilometers. The State Administration of Cultural Heritage announced in 2012 that the total length of the Great Wall of China through the ages is 21196.18 kilometers, distributed in Beijing, Tianjin, Hebei, Shanxi, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Shandong, Henan, Shaanxi, Gansu, Qinghai and other 15 provinces and districts, including the Great Wall wall, trenches, monolithic buildings, customs and related facilities, such as the Great Wall remains back to the birthplace. Previously, the State Administration of Cultural Heritage had in 2009 for the first time announced the Ming Great Wall survey data, the total length of the Great Wall of China's Ming Dynasty was 8,851.8 kilometers. It is one of the ten wonders of the world.

The Great Wall, also known as the Great Wall of China, is an ancient Chinese military defense project, is a tall, strong and continuous wall, used to limit the action of the enemy riding. The Great Wall is not a purely isolated wall, but with the wall as the main body, with a large number of cities, barriers, pavilions, marking the combination of the defense system. The history of the construction of the Great Wall can be traced back to the Western Zhou Dynasty, from which the famous story of "The Beacon Fire Playing with the Lords and Lords" took place in the capital city of Haojing (present-day Xi'an, Shaanxi Province). During the Spring and Autumn and Warring States Periods, the Great Wall was built as the first climax when the powers were fighting for supremacy and defending each other, but the length of the Great Wall at this time was relatively short. After Qin destroyed the six states and unified the world, Qin Shi Huang connected and repaired the Great Wall of the Warring States, which was then called the Great Wall of 10,000 li. Ming Dynasty is the last major repair of the Great Wall of the dynasty, today people see the Great Wall is more than this time to build.