In order to prevent the invasion of other countries, the vassal states built beacon towers and connected them with city walls to form the earliest Great Wall. Later, most of the kings of the past strengthened and repaired the Great Wall. The Great Wall starts from Liaoning Shanhaiguan in the east and reaches Jiayuguan in Gansu in the west. The sites are located in more than 10 provinces including Beijing, Gansu, Ningxia, Shaanxi, Shanxi, Inner Mongolia, Hebei, Xinjiang, Tianjin, Liaoning, Heilongjiang, Henan, Hubei , Hunan and Shandong., City, autonomous region.
The story of Xun Meng Jiang Nu was first seen in Zuo Zhuan. Meng Jiang was Qi Qiliang s wife. Qi Liang died in a battle in 549 BC. Qi Zhuanggong met Meng Jiang in the suburbs and expressed her condolences. Meng Jiang refused to accept that the countryside was not a place of condolences, and Qi Zhuanggong went to Meng Jiang s house to pay condolences. In the Biography of Liu Han from the Western Han Dynasty, it was recorded that Meng Jiang is crying under the city s corpse and crying \\ u0026 hellip; \\ u0026 hellip; for ten days and the city collapsed. It can be seen that the wall of Meng Jiang s crying is Qi Great Wall, and Not the Great Wall of Qin. Around the Tang Dynasty, this theme evolved into the story of Meng Jiangnv, who was searching for her husband and crying for thousands of miles.
Whether it is the Qin Emperor Han Wu or the Ming Dynasty emperor, building the Great Wall is not only an active defense, but also an accumulation of strength and continuous progress. As a defensive project, the Great Wall is mainly composed of Guanyu, city walls, and beacon towers.
Tongguan Pass is an important garrison base along the Great Wall. Guan Yan chose to use the main entrance of the Great Wall. The entire structure was composed of the city walls, gates, gate towers, and city gates of the Pass, and some also included Luo City and the moat. Guanyu s city wall is the main project of the Great Wall. The inner and outer eaves walls are mostly built with giant bricks, boulder, etc., filled with loess and gravel, the height is about 10 meters, and the top width is 4-5 meters. The outer eaves of the city wall are built with stacks for observation and shooting, and the inner eaves wall is built with a wall to prevent people and horses from falling from the top of the wall. The gates are built above the gates, which are the observation and command post of the battle, and the base of the battle.
Qiongcheng Wall is the link between Xiongguan and Tongkou. The city walls are about 7-8 meters high, and the walls are steep in places with steep hills. The wall is the main body to defend the enemy. The average width of the wall base is about 6.5 meters, and the top is 5.8 meters wide. The wall structure mainly includes rammed earth wall, adobe wall, brick wall, masonry wall, stone wall and wooden wall. In the direction of facing the enemy on the outside of the city top, there are some toothed stacks about 2 meters high. There are small holes in the upper part to look at the enemy, and small holes in the lower part to shoot the enemy.
The beacon is a building that uses beacon and smoke to convey military information. The beacon is usually set on the top of the mountain most easily visible inside and outside the Great Wall. It is usually made of earth or stone to form an independent high platform . There is a watch house and equipment for setting fires on the platform. Hang flags, knock, fire, lit fires or light lanterns at night.
In the Great Wall Defense Engineering System, there are also some cities, forts, barriers, and other buildings connected to the Great Wall. Most of these buildings were built inside and outside the Great Wall for soldiers residence and defense.
The towering Great Wall shows the long history of the Chinese nation, reflects the great achievements of ancient Chinese construction engineering technology, shows the strong perseverance and wisdom of the working people of all ethnic groups in ancient China, and reflects the strategic thinking of active defense formed since ancient China Symbol of ancient Chinese culture. The three Great Wall sections of Shanhaiguan, Badaling and Jiayuguan were designated as national key cultural relics protection units in 1961 and have been listed as World Cultural Heritage by UNESCO.