Seismograph is a masterpiece created by Zhang Heng, a scientist in the Eastern Han Dynasty. During the Eastern Han Dynasty when Zhang Heng lived, earthquakes were frequent. Zhang Heng has a lot of personal experience about earthquakes. In order to master the national earthquake dynamics, after years of research, he finally invented the Hou Feng seismograph in the first year of Yangjia (AD 132), which was also the first seismograph in the world.
2. Compass
Compass is the result of China ancient working people's understanding of magnet magnetism in long-term practice. As one of four great inventions of ancient china, its invention has played an inestimable role in the development of human science, technology and civilization. In ancient China, the compass was first used for rituals, etiquette, military affairs and divination, and to determine the orientation when looking at Feng Shui.
Step 3 make paper
Papermaking is one of the four great inventions in China. Paper is the crystallization of the long-term experience and wisdom of the ancient working people in China. This is an outstanding invention in the history of human civilization.
China is the first country in the world to raise silkworms and weave silk. In ancient China, the working people spun silk from superior cocoons, and the remaining evil cocoons and diseased cocoons were made into silk floss by bleaching. After floating, some residual flocs will be left on the mat.
When the flossing frequency is high, the residual flossing on the pad will accumulate into fiber sheets, which can be peeled off after drying and can be used for writing. This kind of floc is called "He Qi" or "square floc" in ancient books because of its small number of by-products. This shows that the origin of ancient papermaking in China is related to silk floss.
4. Movable type printing
Movable type printing is an ancient printing method, which was invented by working people in ancient China through long-term practice and research. First, make a model of the original text and inverted text of the single word, then select the single word according to the original, arrange it in the font plate, ink it and print it, and then remove the font after printing, so as to use it again in the next typesetting.
The invention of movable type printing is a great technological revolution in the history of printing. Clay movable type invented by China in the Northern Song Dynasty (1048) and Bi Sheng (970- 105 1) marked the birth of movable type printing.
He was the first inventor in the world, about 400 years earlier than the movable type printing of German Johannes Gutenberg. In Yuan Dynasty, Wang Zhen successfully created wooden movable type and invented wheel typesetting. In the middle of Ming Dynasty, copper movable type was widely used in Nanjing, Wuxi, Suzhou and other places in Jiangsu.
5, gunpowder
As the first explosive mastered by human beings, gunpowder originated from alchemy in ancient China. The alchemical drugs used by ancient alchemists, such as nitrate and sulfur, were mastered as early as the Han Dynasty. After a long-term practice of alchemy, they invented gunpowder at the latest in Tang Xianzong Yuanhe three years ago (808), and used it to make gunpowder weapons for arson at the end of the Five Dynasties and the beginning of the Northern Song Dynasty.
By the Song, Yuan and Ming Dynasties, all kinds of firearms such as rockets, fireballs (fire axes) and fire axes had reached the level of heating. The invention of gunpowder played an important role in the development of science and technology in the world. Modern black gunpowder was developed from ancient gunpowder in China.
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