Brief introduction to the main achievements of Qin and Han culture

China's first complete almanac, taichu calendar, was formulated by Emperor Wu of the Han Dynasty.

2. The earliest record of sunspots in the Western Han Dynasty.

3. Zhang Heng's earliest scientific explanation and invention of the eclipse in the Eastern Han Dynasty.

4. Nine Chapters Arithmetic in the Eastern Han Dynasty was the most advanced applied mathematics in the world at that time.

5. Huangdi Neijing compiled by the Warring States and the Western Han Dynasty laid the theoretical foundation of TCM.

6. The Classic of Materia Medica by Shennong in the Eastern Han Dynasty is the first complete pharmacological work in China.

7. Hua Tuo, an "imperial doctor", invented "Leprosy Powder" more than 600 years earlier than the West.

8. Zhang Zhongjing's Treatise on Febrile Diseases is an important classic of Chinese medicine in later generations.

There was paper in the early Western Han Dynasty. 105, Cai Lun improved papermaking in the Eastern Han Dynasty.