We in China is the only one of the four ancient civilizations, the only one to continue its own cultural history to this day, there is no fault in the country, our culture is brilliant, is the most precious heritage left to us by our ancestors, in addition, ancient China has emerged a lot of achievements, many even contributed to the development of the world, the four major inventions are the best of them.
As we all know, the four major inventions are the compass, papermaking, gunpowder and printing, as early as the Warring States period, China used magnets to indicate the characteristics of the north and south, invented Sinan, Sinan is actually the earliest compass, the invention of the compass allows human beings to have a precise understanding of the direction, in the navigation, geodesy, long-distance travel and other activities, no longer lost. Papermaking is invented by Cai Lun, the inventor of the Eastern Han Dynasty of China, papermaking allows words and knowledge to be circulated on a large scale, so that the rise of mankind has a material basis, and now we have such a civilized society, inseparable from papermaking.
Gunpowder as early as a thousand years ago, was invented by the alchemists of china's Sui and Tang Dynasties, the invention of gunpowder led to the development of thermal weapons, Western countries in the acquisition of gunpowder, quickly applied it in the military field, causing a revolutionary impact on the world, printing technology and papermaking complement each other, so that human knowledge can be quickly disseminated, the achievement of today's colorful human civilization.
In fact, in addition to these 4 major inventions, our country in ancient times there are many brilliant achievements, now our country is known as the infrastructure demon, in fact, ancient China also has a lot of achievements in construction, of which these 4 ancient projects can be called against the sky, many countries even in modern times can not be copied, the first is the Qin Shi Huang Mausoleum, Qin Shi Huang Mausoleum buried in the history of our country, the first unified Chinese emperor Qin Shi Huang, his mausoleum covers an area of 56 square kilometers, is the world's largest imperial mausoleum, placed in the present are magnificent, let alone before.
The second is the Great Wall, the Great Wall has been built in the Qin Dynasty, used to resist the invasion of the northern nomads, is the most important military defense project in ancient China, is also one of the seven wonders of the world, the third is also the creation of the Qin Dynasty, that is, the Qin Straight Road, the Qin Straight Road is the Qin Dynasty's highway, more than 800 kilometers long, 50 meters wide, equivalent to today's two-way six-lane, the last is the Sui Dynasty to build the Beijing-Hangzhou Grand Canal, the Beijing-Hangzhou Grand Canal connects Beijing and Hangzhou, is one of the oldest canals, It is also the longest ancient canal in the world, and the Beijing-Hangzhou Grand Canal is still in use today, and is one of the important traffic channels in China.
The achievements of our ancient times are brilliant, and it is precisely because of the wisdom of our ancients that we have a better life now, and we need to inherit the wisdom and diligence of the ancients in the future to build our country even better.