Points.
Astronomical calendar: astronomer Lu left the world's earliest record of Halley's comet in the Chronicle; At that time, China's calendar had formed its own fixed system, and basically established the principle of seven leaps in nineteen years, which was earlier than that in the west 160 years. During the Warring States Period, the world's earliest astronomical work "Shigan Xingjing Jing" also appeared.
Physics: Mo Jing has a lot of physical knowledge, including the description of lever principle and buoyancy theory, as well as acoustic and optical records. The relationship between light and shadow, pinhole imaging, etc. By modern scientists, it is called "Eight Light Articles of Mohist Classics".
Medicine: Bian Que, a famous doctor, invented the four diagnostic methods of observation, sniffing, asking and cutting, which are called traditional diagnostic methods of Chinese medicine and have been used for more than two thousand years.
Reason:
During the Spring and Autumn Period and the Warring States Period, the feudal economy developed initially and the level of social productive forces was further improved. This laid the foundation for outstanding scientific and technological achievements and also effectively promoted the development of science and technology. For example, the continuous development and improvement of astronomical calendars directly serve the needs of agricultural development. At the same time, the appearance of simple materialism, such as Xunzi's thought that man can conquer nature, has also promoted the development of science and technology.