四大发明英文版

It's.....
Magnetic compass is a device used to determine geographic direction,usually consisting of a magnetic needle or needles horizontally mounted and free to pivot until aligned with the magnetic field of Earth.
Good science
PAPERMAKING
The oldest paper Fang mper-making is one of the four great inventions of China, the paper is the han long experience accumulation and the crystallization of the wisdom of working people, human a brilliant invention in the history of civilization.
By CAI lun in eastern han dynasty (105) of the first year of yuan xing papermaking, improved by CAI lun in the bark, hemp heads and our raw materials such as cloth, fishing nets, after falling, dao, copy paper, drying technology, manufacturing, is the origin of modern paper. This paper, the raw material is easy to find and very cheap, quality is also improved, gradually widely used. In honour of the feat, CAI lun later generations called this paper "Cai Hou paper"
China is the world's earliest sericulture silk in the world. Han Chinese working people above cocoon silk silk, such as the remaining evil cocoon, cocoon disease such as flocculant with legal system take silk floss. After floating flocculant, woven bamboo mat legacy will be some residual effect. When the number of floating flocculant, woven bamboo mat on the residual flocculant product into a layer of fiber sheet, after dry stripping down, can be used for writing. This flocculant floating there aren't many by-products, and call it HeTi or FangXu on ancient book.
Good science
China's ancient science and technology was once brilliant, which bring us great honor. The spread and application of magnetic compass in western countries urge us to have further understanding of the significance and influence of magnetic compass in the world.
Importance
From simply using it to find direction and judge fengshui to magnetic compass being used in world navigation, till today, various newly-invented magnetic compasses are applied broadly.
Consequences
Especially during the Ming Dynasty, Zheng He made expeditions to Southeast Asia for seven times with more than 27000 people and dozens of big ships each time, which contributes to the extension and development of seafaring and foreign trade in the world
China Ancient Four Inventions 中国四大发明
Magnetic Compass
It's.....
Through the ages, China is considered to be the first country that invented and used magnetic compass.Nearly two thousand years have passed since our ancestors invented compass.
You can say that, the reason why seafaring can develop rapidly in modern times is because it benefits from the invention and application of magnetic compass.
Consequences
It has a big influence on military, economy, seafaring; it pushes forward the great discoveries of geography. Without magnetic compass, Columbus couldn't arrived new continent; China is still adopting a policy of seclusion and comes to a standstill.