From the Pre-Qin Dynasty to the Wei, Jin, Southern and Northern Dynasties, my country’s world-leading scientific and technological achievements include: astronomy, physics, and medicine.

The theory of Yin and Yang and the Five Elements, which was formed during the Spring and Autumn Period and the Warring States Period, incorporated the entire world, including astronomy, into the Five Elements system. "Heaven" not only uses celestial phenomena, but also uses various physical phenomena to show the "mandate of heaven". Therefore, people have to use various symbols to understand the "mandate of heaven", which has changed the previous method of using people's hearts to understand the destiny of heaven. These symbols should be displayed in the "Wude Zhuan". Shown in "Five Elements Luck". The observation of celestial phenomena is not only applicable to national politics, especially abnormal celestial phenomena, which are of great importance because they are related to the "mandate of heaven". During the Spring and Autumn Period and the Warring States Period, some exquisite medical technologies were invented and applied clinically. "Lingshu Sishiqi" records the earliest abdominal puncture in the history of Chinese medicine.

Liu Hui is a mathematician. He has been interested in mathematics since he was a child and studied "Nine Chapters of Arithmetic", an important classic of ancient Chinese mathematics. When he was older, he wrote "Nine Chapters on Arithmetic Annotations" in the fourth year of Jingyuan of Cao Wei (263). He made it easy to understand with his own annotations. Later, Liu Hui wrote the tenth volume of "Nine Chapters on Arithmetic Annotations", namely "Chongdian" (later known as "Haidao Arithmetic"), which brought Chinese surveying to its peak.

Ma Jun is good at mechanical application, improves production volume, and produces water-turning Baixi and the lost guide car, which has won the reputation of "the most famous in the world". He improved the silk weaving machine of the Han Dynasty and made the weaving patterns more three-dimensional, comparable to Shu brocade. He improved Bi Lan's keel cart in the late Han Dynasty and invented a keel waterwheel to irrigate higher farmland. Some of the terraces are still in use. He also transformed the stone-throwing cart into a rotating stone-throwing cart to increase the throwing volume and speed. In order to facilitate transportation on mountain plank roads, Zhuge Liang invented the "Wooden Cow and Flowing Horse". Documents from past dynasties vary in its structure. Scholars generally identify it as a wheelbarrow or a four-wheeled vehicle, but there is currently no definite answer. He invented a repeating crossbow that could fire ten arrows continuously, also known as "Yuanrong". In addition, it is said that the Kongming lantern, which was designed by Zhuge Liang and used to transmit signals, is recognized as the ancestor of the hot air balloon. According to the "Shijiyuan", Zhuge Liang was also the first to create the prototype of the spear, which eventually replaced the spear.