The inner city is the main body and center of Guancheng, with a circumference of 640 meters and an area of 25,000 square meters. The wall is 9 meters high, the stacked wall 1.7 meters, and the total height 10.7 meters. Less than 6 meters with loess rammer, more than 6 meters with adobe masonry. After more than 600 years, although the wall has peeled off, most of it is still intact and firm.
The "Great Wall Badge" unearthed under the Great Wall in the northern section of Jiayu later recorded in detail the division of labor between repairing the Great Wall and building the inner wall at that time.
It is clearly recorded that after the completion of the construction project, people should carry out strict acceptance: shoot the wall with an arrow within a certain distance from the wall, and if the arrow cannot penetrate, it will prove that the wall is solid and qualified; If the arrow shoots into the wall, it proves that the project is unqualified and needs to be reworked and rebuilt. Such a strict management system of the Great Wall project ensures the quality of the Great Wall and the inner wall project.
The west gate of the inner city, also known as the soft and far gate, is engraved with the word "soft and far" on the front of the gate, which means that in order to realize the long-term and stable strategy of governing the country, the Ming Dynasty implemented the "Huairou" policy towards the nomadic people in the border areas to appease the remote areas.
Inside the city, outside the west gate, there is also urn back protection, covering an area of more than 500 square meters each, with tight layout.
The west wall of Guancheng protrudes and the door opens in the middle. The original tower here has the same shape as the east and west floors. On the third floor, things line up, and there is a brick Luocheng in the west. The city wall is built on the east, south and north sides, connecting the Great Wall. Therefore, with the trend that there are cities outside the city, it is very important to keep the city together.
Jiayuguan tower