Xi'an Ming City Wall The inscription on the Xi'an City Wall records that the Xi'an City Wall was built from the third to the eleventh year of Hongwu in the Ming Dynasty (1370-1378 AD), and was extended to the north and southeast on the basis of the imperial city of the Sui and Tang Dynasties. , more than 600 years ago, the city wall is 12 meters high, 18 meters wide at the base, 14 meters wide at the top, and 2.65 kilometers long in the east and west. It is 4.2 kilometers long in the north and south respectively, with a circumference of 13.7 kilometers. It is rectangular in shape, with the Drum Tower and the Bell Tower standing in it. Long before the establishment of the Ming Dynasty, when Zhu Yuanzhang conquered Huizhou, a hermit named Zhu Sheng told him that he should "build walls high, accumulate grain widely, and slowly become king." Zhu Yuanzhang adopted these suggestions. After the country was unified, he ordered all prefectures and counties to build cities universally. Zhu Yuanzhang believed that "the mountains and rivers in the world are the only ones that are safe and secure". It was during this city-building boom that the ancient city wall of Xi'an was expanded on the basis of the old imperial city of the Tang Dynasty, presided over by the governor Pu Ying. Climbing the ancient city wall and looking around, the buildings are majestic and elegant. There are four city gates in the east, west, south and north of Xi'an City, each with three gates: main tower, arrow tower and gate tower. The gate tower is at the outermost part, and its function is to lift the suspension bridge. The archery tower is in the middle, with square windows on the front and both sides for archery. The main building is at the end and is the main entrance of the city. The archery tower and the main tower are connected by a wall, which is called Wengcheng. It is a place for garrisoning troops. There is also a horse path leading to the top of the city in the urn city. It goes up slowly and without steps, making it easier for horses to get on and off. The old four city gates and the urn city were made of green and gray bricks. There were 98 corner platforms around the city, all with turrets on them; there was a Kuixing Tower on the east side of the south gate; there were climbing paths all around; there were 6,000 crenels above them. There are yellow pennants printed with flying dragons, unicorns and the like. There is a moat outside the city, and there are suspension bridges across the river at the four gates, which are a tangible barrier for the defenders. There is a channel made of blue bricks every 40-60 meters on the top of the city wall for drainage, which plays a very important role in the long-term protection of the ancient city wall of Xi'an. The city is surrounded by a wide and deep river, and there is a suspension bridge opposite the city gate that can be raised and lowered at any time. Once the drawbridge was raised, access to and from the city was cut off. The Xi'an City Wall in the Ming Dynasty was once a large and sophisticated military defense system, and it is also the most complete ancient castle existing in my country. The ancient castle of Xi'an shows the ingenuity of the working people in ancient my country, and also provides us with rare physical information for studying the history, military and architecture of the Ming Dynasty. Xi'an is located in the south of the central part of the Guanzhong Plain. Bordering the Wei River to the north and Zhongnan Mountain to the south, it is surrounded by meandering streams and has a suitable climate, fertile land, rich products and beautiful scenery. Xi'an, also known as Chang'an in ancient times, was the name of the Italian explorer Mark. The starting point of the famous ancient Silk Road in Polo's travels is a city full of historical relics. Xi'an is one of the seven famous ancient capitals in China, with a history of more than 3,100 years. In the long years, thirteen dynasties including Zhou, Qin, Han and Tang successively established their capitals here, which lasted for more than 1,100 years. Zhou people used to make rituals and music here, and cast regulations in gold and stone; Qin Shihuang built the Afang Palace, a masterpiece in the history of Chinese architecture, and built the Qin Shihuang Mausoleum on Lishan, a huge and extremely rich historical treasure house; during the Han and Tang Dynasties, this place was The center of China's politics, economy, culture and foreign exchanges, it is the starting point of the Silk Road that connects Eastern and Western civilizations, and it is also an Oriental metropolis where guests gather. "Rome is in the east and Chang'an is in the west" is a reflection of Xi'an's historical status at that time. Today, Xi'an is as famous as the world's famous historical cities Athens, Cairo, and Rome, and is known as the world's four ancient civilization capitals. The profound historical and cultural accumulation has endowed Xi'an with rich cultural relics. Strolling through the streets of the ancient city, you will see bricks and tiles from the Qin Dynasty and Han Dynasty. When you go out into the countryside, you will see all kinds of scenery that can arouse people's respect for history. Within its territory, there are 314 key cultural relics protection units (including 84 national and provincial key cultural relics protection units), more than 4,000 ancient sites and mausoleums, and more than 120,000 unearthed cultural relics. The Mausoleum of Qin Shihuang is the first Chinese monument to be listed as a World Heritage Site. The Ming Dynasty City Wall of Xi'an is the most complete and magnificent ancient castle in the world. In recent years, the development of Han Yangling has attracted worldwide attention, and the unearthed nude colorful figurines are known as the "Venus of the East." The city has the Banpo ruins with a history of more than 6,000 years; the Forest of Steles Museum, known as a stone history library; the Shaanxi History Museum with the largest collection of cultural relics in the country; the Big Wild Goose Pagoda where the famous monk Xuanzang translated scriptures in the Tang Dynasty; the oldest in the northwest The mosque Huajue Lane Mosque...