The Great Wall, also known as the Great Wall, is an ancient Chinese military defense project and one of the world's most famous cultural heritages. It stretches from Liaodong in the east to Jiayuguan in the west, with a total length of thousands of kilometers, and is the longest city wall in the world. Its construction spanned several dynasties and lasted for more than two thousand years.
The construction of the ancient Great Wall is not only a huge military defense project, but also a historical epic of the Chinese nation, according to historical records, from the 7th century BC Chu State to build the "square city", to the Ming Dynasty a total of more than 20 vassal states and feudal dynasties participated in the construction of the Great Wall, of which the length of the Great Wall of the Qin, Han and Ming dynasties is more than 5,000 kilometers. Therefore, if you add up the Great Wall built in various eras, the total length is estimated to be more than 50,000 kilometers.
The name of the "Great Wall" began in the Qin Dynasty. From the 33rd year of Qin Shi Huang (214 BC) to send Meng Tian to attack the Xiongnu, to the death of the first emperor, Qin II gave Meng Tian and Fusu death (210 BC), a total of 5 years to build. According to historical records, after Qin unified the six countries, the first emperor sent General Meng Tian to lead 300,000 people to the north to attack the Xiongnu. After Meng Tian expelled the Xiongnu, he took the land south of the Yellow River as 44 counties, built the Great Wall, used the terrain, set up barrier fortresses along the Yellow River and Yinshan, and used the old Great Wall of Zhao and Yan in the north and east, and used the old Great Wall of King Qin Zhao in the west to connect them, and completed the Great Wall of more than 5,000 kilometers from Lintao in the west (now by the Tao River in the south of Gansu Province) to Liaodong in the east. This Great Wall of Qin, far north of today's Great Wall. During the Han Dynasty, in order to further consolidate the northern frontier and resist the invasion of the Xiongnu, the Han Dynasty carried out large-scale additions on the basis of the original Qin Great Wall, and built more than 4,000 kilometers of the Great Wall, making the total length of the Great Wall reach more than 10,000 kilometers.
Subsequent dynasties, such as the Northern Wei, Northern Qi, and Sui dynasties, repaired and strengthened the Great Wall. By the Ming Dynasty, the construction of the Great Wall reached its heyday, and the Ming Dynasty carried out large-scale repairs and reconstructions of the Great Wall, built most of the Great Wall, and used a large number of masonry materials to make the Great Wall more durable and durable. The construction of the Great Wall in the Ming Dynasty continued until the middle of the 17th century.
Therefore, the construction of the ancient Great Wall is not only a huge military defense project, but also a historical process that lasted for more than 2,000 years, involving the repair and reconstruction of many dynasties, witnessing the historical changes and brilliant achievements of the Chinese nation.