Why did China s scientific and technological achievements lead the world during the Three Kingdoms a

Because that was the age of foreigners, still in the tribal era.

Forgive me for being ignorant, the Three Kingdoms, the Two Jin Dynasties, the Northern and Southern Dynasties, we are all at war, do you have any scientific and technological achievements? The military ones don't count.

The development trend of a nation is only in some aspects, and at that time the countries of ancient Rome and Egypt had already begun to decline.

1. Guide car.

Cao Wei scientist Ma Jun created the compass car, which uses the geomagnetic effect unlike the compass, it does not use magnetism. It is a simple mechanical device that uses gear transmission to indicate direction.

The principle is that the two-wheeled guide car is driven by manpower, so as to drive the wooden gears in the car to rotate to transmit the difference between the two wheels when steering.

Then drive the wooden man on the car to point to the direction of the car and the direction of the car is the opposite angle of the same angle, so that the wooden man on the car indicates the direction, no matter where the car turns, the hand of the wooden man always points to the direction indicated by the wooden man when the guide car departs.

2. "Nine Chapters of Arithmetic Notes".

Cao Wei mathematician Liu Hui completed the "Nine Chapters of Arithmetic Notes", which is a valuable document in the history of Chinese mathematics, that is, it also has a certain position in the history of world mathematics, and its main contributions are as follows:

1. Limit concept and circumcision.

2. Liu Hui's theorem on volume calculation.

3. Create decimal notation.

4. Improved solution of systems of linear equations: There is a chapter in "Nine Chapters of Arithmetic" dedicated to the problem of systems of linear equations.

5. Summarize and develop the heavy difference technique In ancient China, the measurement method of using "table" (benchmark) or "moment" (carved to leave a mark) for two measurements was called "heavy difference technique".

3. "Yugong Geographical Map".

Pei Xiu of the Western Jin Dynasty served as a local official and was a cartographer. He collected historical materials, studied maps, and completed the "Yugong Geographical Map"; The distribution and administrative division of the mountain range at that time were scientifically described.

He summarized the drawing methods of his predecessors and proposed the methods of mapping the six bodies: fraction (proportional size), quasi-wang (object orientation), daoli (road distance), high and low, square evil and tortuous (these three represent the error caused by the undulation of the terrain).

Fourth, "Da Ming Calendar".

The Great Ming Calendar is a calendar created by Zu Chongzhi, a famous Chinese mathematician and scientist during the Northern and Southern Dynasties, also known as the "Jiazi Yuan Calendar".

In the calendar, Zu Chongzhi introduced the concept of "precession" for the first time, thus making the calendar more accurate, and it was the second major calendar reform in China.

Fifth, "Qi Min's Technique".

Qi Min Yao Shu was written in the last years of the Northern Wei Dynasty (533-544 AD), which is a comprehensive agricultural work written by Jia Sixian, an outstanding Chinese agronomist during the Northern Wei Dynasty and the Song to Liang dynasties in the Southern Dynasties, and is also one of the earliest monographs in the history of agriculture in the world, and the earliest complete agricultural book in China.

The book consists of 10 volumes and 92 articles, systematically summarizing the agricultural and animal husbandry production experience, food processing and storage, utilization of wild plants, and methods of controlling famine among the working people in the middle and lower reaches of the Yellow River before the sixth century, and introduces in detail the seasons, climate, and the relationship between different soils and different crops, and is known as the "Encyclopedia of Ancient Chinese Agriculture".

Encyclopedia – Northern and Southern Dynasties

Encyclopedia – Jin Dynasty

Encyclopedia - Cao Wei

Encyclopedia - Western Jin Dynasty

1. Science and technology of the Wei, Jin, Southern and Northern Dynasties.

1 Zu Chongzhi and Pi: Zu Chongzhi, a mathematician of the Southern Dynasties, calculated pi to the seventh decimal place for the first time in the world, leading the world for nearly a thousand years.

2 Jia Siyun and "Qi Min Marrying Technique": The Northern Dynasty agronomist, the book "Qi Min Yao Shu", is the first complete agricultural science work in China.

3 Li Daoyuan and "Notes on the Book of Water": A geographer of the Northern Wei Dynasty, the author of "Notes on the Book of Water", "Notes on the Book of Water" narrative writing, beautiful writing, wonderful places like both poetry and painting, it is not only an excellent geographical work, but also has high literary and historical value.

2. The art of the Wei, Jin, Southern and Northern Dynasties.

1 Calligraphy: Wang Xizhi of the Eastern Jin Dynasty, known as the "Saint of Calligraphy", his representative work "Orchid Pavilion Preface".

2 Painting: Gu Kaizhi of the Eastern Jin Dynasty, representative works include "Female History Zhen Tu" and "Luo Shen Fu Tu".

3 Carving: 1) The purpose of digging the caves: to promote Buddhism.

2) Grotto art: During the Northern and Southern Dynasties, the Yungang Grottoes in Datong, Shanxi Province and the Longmen Grottoes in Luoyang, Henan.

3) Characteristics: It inherits the artistic achievements since the Qin and Han dynasties, and also absorbs the characteristics of foreign Buddhist art.

1: Zu Chongzhi of the Southern Dynasty accurately calculated pi in between, and this achievement advanced a thousand years earlier than that of foreign countries.

2. Jia Sixian of the Northern Dynasty wrote "Qi Min Yaoshu", which systematically summarized the experience of agricultural and animal husbandry production in the middle and lower reaches of the Yellow River before the sixth century, the processing and storage of food, and the utilization of wild plants, which is the earliest and most complete agricultural book in China.