What were the inventions in ancient China?

1, Hou Feng Seismograph is the first instrument to test earthquakes in the world. It was invented by Zhang Heng, a scientist of the Eastern Han Dynasty in China, in the first year of Yangjia, Shun Di, the Emperor Gaozu (A.D. 132), and this invention of Zhang Heng was recorded in Zhang Hengchuan in the later Han Dynasty. Hou Feng seismograph is made of fine copper, with a diameter of eight feet and a height of eight feet, which is about 1.89 meters today. It is shaped like a wine bottle.

2. Compass, called Sina in ancient times, is mainly composed of magnetic needles installed on the shaft. Under the action of natural geomagnetic field, the magnetic needle can rotate freely and keep in the tangential direction of magnetic meridian. The south pole of the magnetic needle points to the geographical south pole (magnetic north pole), and the direction can be distinguished by using this property.

3, gunpowder, as the name implies, can be caused by sparks, flames and other violent burning drugs. According to Fan Ziran, China had been used for folk livelihood in the Spring and Autumn Period, and Fan Ziran said that "saltpeter leads a long way". Gunpowder is one of the four great inventions in China. It is a substance that can burn quickly and regularly under the action of appropriate external energy, and at the same time produce a large number of high-temperature gases.

Printing is one of the four great inventions of working people in ancient China. Engraving printing was invented in the Tang Dynasty and was widely used in the middle and late Tang Dynasty. Song Renzong and Bi Sheng invented movable type printing, which marked the birth of movable type printing. He was the first inventor in the world, about 400 years before Johannes Gutenberg invented movable type printing, which marked the birth of movable type printing.

Papermaking is one of the four great inventions in China, which was invented in the Han Dynasty and perfected in the Han Dynasty. China is the first country in the world to raise silkworms and weave silk. In the first year of Yuan Xing in the Eastern Han Dynasty (105), Cai Lun improved papermaking. He made paper from bark, hemp head, cloth, fishing net and other raw materials through crushing, mashing, frying and baking, which is the origin of modern paper.