Jianmenguan was very famous in ancient times. It is located at the interruption of Jianmen Mountain in Jiange County, Guangyuan City, Sichuan Province. The two walls are opposite, and its shape is like a door, so it is called "sword door" and has the reputation of "sword door is dangerous in the world". In history, Zhuge Liang was called Jiangeguan when he was prime minister of Shu and Han, and Jianmenguan after the Tang Dynasty. Historically, Jianmenguan buildings have been built and destroyed repeatedly, and the latest reconstruction was after the 20 10 earthquake. Lu You has "riding a donkey into the sword gate in the drizzle".
Jianmenguan, located in the south of Jiange County, Sichuan Province 15km, is named "Jianmen" because it broke Jianmen Mountain. Its two sides are precipices, and the peaks are like swords, separated by precipices, and the two walls are opposite, which are shaped like doors. Enjoy the reputation of "the sword gate is dangerous in the world". Jianmenguan, formed in Cretaceous, is a rare Danxia landscape with wall-like conglomerate cliffs in the world. It is a natural gateway, with a vertical height of nearly 300 meters and a narrowest bottom of only 50 meters. This is the first level in the world.
Brief introduction of Jiayuguan history
Jiayuguan, known as "the first male pass in the world", is located in the middle of the narrowest valley 5 kilometers west of Jiayuguan City, Gansu Province. The walls on both sides of the city pass through the desert Gobi, connecting the Great Wall of Montenegro in the north and the first pier in the world in the south. It is the westernmost part of the Great Wall in the Ming Dynasty. It was once called the throat of Hexi in history. Because of its steep terrain and magnificent architecture, it is called lock key. Jiayuguan is the traffic fortress of the ancient Silk Road and one of the three wonders of the Great Wall of China (Shanhaiguan in the east, Beitai in the middle and Jiayuguan in the west).
Jiayuguan was founded in the fifth year of Hongwu in Ming Dynasty (1372). It consists of inner city, outer city, Luocheng, Wengcheng, moat and the Great Wall on the north and south wings, with a total length of about 60 kilometers. Towers, piers and forts are scattered all over the Great Wall, which consists of three lines of defense: inner city, outer city and moat, overlapping defense, forming a defense system of five miles, one long, ten miles, one pier, three miles, one fort and a hundred miles.