When were the four great inventions invented

The compass and gunpowder were invented during the Spring and Autumn Period and the Warring States Period, papermaking was the Western Han Dynasty, and printing was the Sui Dynasty.

1.Compass: Song Dynasty 2Paper: Han Dynasty 3Typography: 1300 years ago 4Gunpowder: Tang Dynasty.

Kiss, the four major inventions are the four important inventions of ancient China that Changhe refers to, including 1Compass:

It was invented around the 4th or 3rd century BC. 2.Papermaking:

It was invented during the Eastern Han Dynasty (25 AD - 220 AD). 3.Gunpowder:

It was invented during the Tang Dynasty (9th or 10th century). 4.Movable type printing:

It was invented during the Northern Song Dynasty (1041 AD). These four inventions were invented in different periods of the history of the Li family, and they had an important impact on the development and progress of ancient China and the world.

The four great inventions of ancient times were the compass, gunpowder, printing, and papermaking. These inventions are the common wisdom of many working people, and it is impossible to say who invented them exactly.

1. Compass.

According to legend, it was used to identify the direction of the march when the Yellow Emperor fought Chiyou. The guide car is in fact a mechanical device, and the hands of the immortals point in the same direction when the guide car is moving.

The principle of making a compass car is different from the compass's use of magnetic force to indicate direction. During the Warring States period, the instrument Sinan who really used the magnetic force of a magnet to indicate the direction appeared.

During the Song Dynasty, the technology of making the compass was greatly improved, which indirectly led to the prosperity of China's navigation industry, and the Arabs and Persians who interacted with China learned to use the compass and spread it to Europe.

2. Gunpowder Gunpowder was invented by Fangshi in the process of alchemy. The dragon cannon is like a bazooka, with two small rockets at the head and tail of the dragon cannon, and when the small rockets are ignited, the bazooka will rise, and then ignite the other rockets inside the bazooka and shoot at the enemy, usually in water battles.

In the Tang Dynasty, gunpowder was already used in warfare, and in the Song Dynasty, it already had the lethality of the iron can type**. Chinese gunpowder was transmitted to Arabia and then to Europe through the Mongol conquests.

3. Printing.

Before the printing technology, the books were copied by hand one by one, and later there were rubbing, engraving and other printing methods, but it was still very time-consuming and laborious, until the Song Dynasty, Bi Sheng invented movable type printing, which greatly improved the printing technology.

Use cement to make a square with the same specification, and engrave text on one end, which is called a movable type printing pad. When printing, the movable type printing pad is arranged according to the content of the article, fixed on the chassis coated with adhesive to become a movable type plate, and then the plate is inked, and then the text can be printed by laminating it with paper.

4. Papermaking The earliest writing in China is to appear in the oracle bone inscription of Yin Shang, and then there is the Zhong Ding Wen (also known as Jin Wen) cast on the bell tripod, and in the Spring and Autumn Period and the Warring States Period, people began to engrave the text on the wooden tablet and use a rope to run through the book.

In the Qin and Han dynasties, writing was written on silk cloth with a pen, and it was not until the Eastern Han Dynasty that the eunuch Cai Lun improved the method of making paper, and people began to use paper as a writing tool in large quantities. Papermaking is a major event in the history of human civilization, and it took more than a thousand years for this advanced technology to reach Europe.

Bi Sheng's invention of movable type printing, Cai Lun's papermaking method, gunpowder was invented by ancient Chinese alchemists in the process of alchemy, and the specific inventor has not been verified, but it is recognized that the invention and spread of gunpowder is inextricably linked with Sun Simiao, the "king of medicine" in the Tang Dynasty, so it is also believed that Sun Simiao is the inventor of gunpowder. Compass, according to legend is 27 BC