Because it is longer than the Great Wall of Wan Li, it is also called the Great Wall of Wan Li. According to records, Qin Shihuang used nearly one million laborers to build the Great Wall, accounting for one twentieth of the national population. At that time, there was no machinery, and all labor depended on manpower, and the working environment was very difficult. During the Spring and Autumn Period and the Warring States Period, in order to defend against the invasion of other countries, the vassal states built beacon towers and connected them with city walls. The earliest Great Wall was formed. After that, most emperors strengthened and supplemented it. The Great Wall starts from Shanhaiguan in Hebei Province in the east and ends at Jiayuguan in Gansu Province in the west, passing through 10 provinces, autonomous regions and municipalities from east to west. The total length of the Great Wall is 85 1.8km, of which the artificial Great Wall is 6259.6km and the trenches and natural formations are 2592.2km 。
The topography of the Great Wall is an important experience in building the Great Wall. It was determined when Qin Shihuang was in power, and Sima Qian wrote it in Historical Records. Since then, the construction of the Great Wall in each dynasty has been carried out in accordance with this principle. All the passes in Guancheng are built between two high mountains and canyons, or at the bend of the river or where Pingchuan passes, which can not only control the danger, but also save manpower and material resources.
Building castles or beacon towers is also in a dangerous place. As for building city walls, we should make full use of the terrain. For example, the Great Wall, such as Juyongguan and Badaling, is built along the back of the mountain. Some sections are very steep from the outside of the wall, but they are very gentle inside, which has the effect of "easy to defend but difficult to attack". In Liaoning Province, the Great Wall in Liaodong Town in Ming Dynasty had a steep cliff. The Great Wall will be built by slightly splitting the cliff. Some places completely use cliffs, rivers and lakes as natural barriers, which can be said to be wonderful. As a great project, the Great Wall has become a precious heritage of the Chinese nation.
On June 25th, 20001year, the Great Wall, as an ancient building from the Spring and Autumn Period to the Ming Dynasty, was approved by the State Council to be included in the fifth batch of national key cultural relics protection units. In addition to the "outer" Great Wall, the "inner" Great Wall and the "inner three passes" Great Wall were all built in the Ming Dynasty. The "Neiguan" Great Wall was built in the Northern Qi Dynasty, starting from Pianguan at the junction of Inner Mongolia and Shanxi in the west, Yanmenguan and Pingxingguan in the east, entering Hebei, then turning to the northeast, passing through Yuanyuan, Fangshan and Changping counties, reaching Juyongguan, and then from north to east, reaching the end of the Great Wall. Roughly north-south. In many places, the "Neisanguan" Great Wall is parallel to the "Inner" Great Wall. In some places, the distance between the two cities is only tens of miles. In addition, a large number of "heavy cities" have been built. There are as many as 24 "heavy cities" around Yanmenguan!
The Great Wall lies in the north of China. It starts from Hushan, Liaoning in the east and reaches Jiayuguan, Gansu in the inland area in the west. It runs through Liaoning, Hebei, Tianjin, Beijing, Inner Mongolia, Shanxi, Shaanxi, Ningxia and Gansu provinces, with a total length of about 885 1.8km, or about17703.6li.. There is the Great Wall of Wan Li in the world.
According to historical documents, more than 20 vassal states and feudal dynasties built the Great Wall. If you add up the Great Wall built in past dynasties, it is about 10 Wan Li. The length of the Great Wall built in Qin, Han and Ming dynasties all exceeded 1 Wan Li. Now Xinjiang, Gansu, Ningxia, Shaanxi, Inner Mongolia, Shanxi, Hebei, Beijing, Tianjin, Liaoning and China.