Qin Shi Huang is known as the "one emperor through the ages", and his achievements in sweeping the Liuhe to unify the world are still praised by people to this day. In addition, a series of super projects he left behind still play an important role in modern times, such as Qin Zhidao and Zheng Guoqu. However, among the super projects built by Qin Shi Huang, the most striking is undoubtedly the Great Wall.

In the eyes of modern people, the Great Wall is not only a world-renowned cultural card, but also known as one of the eight wonders of the world, a miracle in the history of world architecture. From 214 BC to the present, the Great Wall has been standing for more than 2,000 years. The majestic and extraordinary Great Wall has brought people a shocking visual experience. So, what kind of black technology did Qin Shihuang use? Say it and don't believe it.

Origin of the Great Wall

Since ancient times, the farming civilization in the Central Plains has always been invaded by the northern nomads. Therefore, as early as the Western Zhou Dynasty, in order to defend against the attacks of the northern nomads, the Zhou Dynasty began to build the "Leh City" on the border in a large-scale and planned way for defense. In the Spring and Autumn Period and the Warring States Period, the various states competed for hegemony, and in order to defend against the attacks of other princes, each princely state also began to build cities on their borders, forming the "Great Wall of Mutual Defense between Princes".

For the Qin, Zhao, and Yan kingdoms located in the north, in addition to guarding against the attacks of other vassal states, they must always be on guard against the attacks of the Huns. Therefore, the Qin, Zhao, and Yan kingdoms also built the "Great Wall of Rejection Hu" to resist the attack of the Huns.

In 214 BC, after unifying the world, Qin Shi Huang began to free up his hands to deal with the threat of the Xiongnu in the north. He sent general Meng Tian to lead an expedition to the Huns. After Meng Tian achieved a series of victories against the Huns, Qin Shi Huang decided to build an unprecedented Great Wall, hoping to solve the Xiongnu's threat to the Central Plains once and for all.

The Great Wall built by Qin Shihuang, known as the "Qin Great Wall" in history, according to the survey results of the cultural relics and surveying and mapping department, the "Qin Great Wall" is 11,000 kilometers long. The Great Wall built by Qin Shihuang was built on the basis of the "Rejecting Hu Great Wall" of the Qin, Zhao and Yan kingdoms. So far, it has a history of more than 2,000 years and is still standing. For example, in Guyang County alone, nearly 120 kilometers of "Qin Great Wall" are well preserved.

The role of the Great Wall

The original purpose of Qin Shi Huang's construction of the Great Wall was to solve the threat of the Huns and other nomads to the Central Plains once and for all. But today, many experts and scholars have put forward the theory that the Great Wall is useless. They believe that the Great Wall's role in resisting foreign enemies in ancient times was very limited, and it failed to fundamentally solve the nomadic invasion of the Central Plains. Therefore, in the eyes of many experts, the construction of the Great Wall has become one of the tyranny of Qin Shi Huang's labor and wealth.

So, is the Great Wall really as useless as experts say? The answer is of course no.

In the history of more than 2,000 years, if it were not for the existence of the Great Wall, the number of times the Central Plains Dynasty was breached would definitely increase greatly. Since the Qin Dynasty, almost all emperors of all dynasties have repaired and strengthened the Great Wall. For example, Emperor Wu of the Han Dynasty, although he successfully expelled the Xiongnu to Mobei, still built a "outer Great Wall" that was 10,000 li long in order to resist the counterattack of the Xiongnu. If the Great Wall really doesn't work, why did these ancient emperors build and fortify the Great Wall?

Clearly, the Great Wall is not as useless as some experts say. In the long ancient society, the Great Wall played a vital role in protecting the security of the Central Plains, which is beyond doubt.

Architectural Secrets of the Great Wall

Since 214 BC, the Great Wall built by Qin Shi Huang has experienced more than 2,000 years of ups and downs. In this long period of time, it is undoubtedly a very shocking thing that the Great Wall can always stand. Although in history, many sections of the Great Wall were destroyed by wars, and many sections collapsed due to disrepair, but among some inaccessible mountains and mountains, you can still see the magnificent relics of the Qin Great Wall.

The ancient building materials were relatively scarce. In the absence of steel bars and cement, what kind of black technology did Qin Shihuang use to make the Great Wall stand up to this day? When it comes to this issue, we have to admire the wisdom of the ancient working people.

The ancient technology was relatively backward, so the manpower and material resources needed to build a super project like the Great Wall were simply astronomical. Qin Shi Huang built the Great Wall. Hundreds of thousands of laborers were ordered, but the most difficult thing to solve was not the problem of manpower, but the problem of building materials.

There was no cement in the Qin Dynasty. In order to increase the firmness of the Great Wall, people at that time came up with an excellent method. The people who built the Great Wall used glutinous rice mixed with egg white to make juice in a certain proportion, and then mixed with building materials such as masonry, earth and wood, layer by layer, and the effect was comparable to modern cement. The Great Wall built in this way, although it has experienced thousands of years of wind and rain, is still as stable as a rock.

In addition to the above method, the ancients were also good at using natural resources to build the Great Wall. For example, in the Gobi Desert outside Yumen Pass, because the transportation conditions in ancient times were relatively backward, it was difficult to transport materials from the mainland to build the Great Wall. At this time, the people who built the Great Wall had to use local materials to replace loess and masonry with local specialty reed mixed with gravel. Because the local gravel is rich in alkali, and the reed is rich in salt, under the action of chemical reaction, the built Great Wall is also very strong.