The construction of the Great Wall of China dates back almost 2,000 years. It was built in the spring and autumn times and the era of the warring kingdoms of the period. The wall was built for a comprehensive defensive purpose of the Mamluks in that area. The wall was divided into nine military walls, each headed by a military commander and a large number of soldiers, the number of troops was about one million.
The Great Wall of China begins from Chenhuangdao in the Yellow Sea Gulf to Gautai in Gansu in the west, and Beijing to Handen.

The Great Wall cuts a vast area of 2,400 km 2, and the wall is mainly made up of a large collection of hard stone and clay. The wall contains a large number of guard towers, one of which is located in every 200 meters of its length, and helped the brick-clad walls in the eastern parts of the country to maintain the fence and prevent collapse, while many of its parts disappeared in the southern regions. The structure of the wall in the desert areas is characterized by stones and willows. The part of the northwestern regions consists of bricks and compressed soil.
The Great Wall of China contains a number of military barracks, observation towers and towers for enemy attack alert and secret corridors, as well as a number of offensive installations in the event of an external threat. It also contains food storage rooms for soldiers, and a waterway to collect rainwater through it and automatically remove it from the wall, in order to prevent any damage to its structure due to flooding with rainwater.

The most popular destination of the visit to the Great Wall is Badaling. All cars, trains and buses from Beijing go north-west through the valleys covered with flowers and trees during the summer. This area was considered one of the most beautiful in the 13th century.
It is thought in the old days that it was possible to see the wall from the moon, when it was published in the Book of the Second Book of Miracle in 1938, but in fact, seeing the wall from the moon is almost impossible, its width does not exceed a few meters.