BeijingCityWallRefers to the old farming for the nation to deal with war, civil use, such as masonry materials, Du Yi used as a defense built around an obstacle to building. As early as the Ming Dynasty to establish ago, when Zhu Yuanzhang capture Huizhou, a hermit named Zhu's up to tell him it should be "high wall, grain, the relief win." Zhu Yuan adopted the recommendations. When the reunification of the country, he will prefecture command the universal fortification. Zhu Yuanzhang that "the world is beautiful, but, as in the Qin-risk." Xi'an Ancient City Wall in the city's boom, presided over by the British Pu captaincy general, in the Tang Imperial on the basis of the old city with the expansion.

After the expansion of the Ming Dynasty in Xi'an city wall 12 meters high and 12-14 meters Dingkuan, Dikuan 15-18 meters, about 13.7 kilometers week. Wall at 120 meters repair an enemy of Taiwan, prominent in the walls, roof and the city-wall. It is designed to climb the city shot and killed the enemy of the set. Enemy half the distance between Taiwan, just in the bow and arrow with a range of effective, easy shot from the side of the enemy siege. A total of wall on the enemy Taiwan 98, and above all has the unmanning Dilou.

Ancient weapons behind, Shing Mun is the only access, so here is a feudal ruler's hard focus on defense. East of Xi'an in the west, north and south of the Shing Mun four were being floor, Jian Lou, triple-Shing House gates. Gate House, in the most, their role is to lift suspension bridge, in Jian Lou, and positive on both sides of a square with a window for the use of archery. In the House, is the most, is the main entrance of the city. Jianlou between the floor and is used to connect the wall, called Weng Cheng, is the troops. Weng Cheng also the first horse to the city, there is no relief steps to facilitate the horses up and down. The city also has a horse Road 11. 1.40 outside the city walls have a prominent corner of Taiwan. In addition to the southwest corner is a round, is likely to maintain the status quo corner of the Tang Imperial, the other is a square. Xiu angle on the stage there is more to Taiwan than the enemy tall turret, shows that the war here in the important position.

On the outer walls of buildings which have cog, also known as the pile wall, a total of 5984, there Duokou, archery and observation. The inside wall as the wall of women, no Duokou to avoid walking between the soldiers had fallen into.

The original city wall of Xi'an Loess complete with tiered rammed into play, with the bottom soil, lime juice and glutinous rice mixed rammed play, abnormal hard. Later the entire inside and outside the city wall built on top of the wall and brick. Every 40-60 meters at the top of the wall have a green-brick structure with a sink for drainage, the ancient city wall of Xi'an, long-term protection from a very important role.

You Kuanyou a city surrounded by deep Cheng He is on the Shing Mun Department has always ups and downs of the suspension bridge. Up a suspension bridge, access roads in and out of the city was cut off.

Ming Dynasty City Wall of Xi'an has a large and sophisticated military defense systems, China is also one of the most complete existing ancient castle. Xian, the ancient castle show that China's ancient wisdom of working people, we also study the history of the Ming Dynasty, military construction and provides a rare kind of information.

With a stone wall to resist fire, as well as bows and arrows and other weapons to attack the project so that the enemy can not function in the absence of equipment such as scaling ladders and siege towers, climbing up steep walls. The wall at the top of the defender may be down or archery are hurled objects to the siege attacks. Siege and therefore are completely exposed to the open space, compared to defend those who have a strong defense to sit down and shooting advantage in the siege when the shooting appears to be up quite a disadvantage. If the wall is built on steep cliffs or other high places, and the effectiveness of its defense value would be enhanced. Shing Mun on the walls and entrances and exits will be narrowed as much as possible in order to provide a greater degree of defense.