Zhang Zhongjing and Hua Tuo were two famous doctors in the late Eastern Han Dynasty. Zhang Zhongjing wrote Treatise on Febrile Diseases, recorded 300 or 400 prescriptions, expounded the theory and treatment principles of traditional Chinese medicine, and laid the foundation of TCM therapeutics. Later generations revered him as a "medical sage". Hua Tuo is a folk doctor who is proficient in all kinds of medicine, especially in acupuncture and surgery. The "Ma Fei San" he made is an anesthetic. He is the first doctor in the world to adopt general anesthesia.
The medical school run by Emperor Taizong at that time was 200 years earlier than that of Western Europe. Herbal Medicine of Tang Dynasty compiled by Tang Gaozong is the first pharmacopoeia compiled and promulgated by the state in the world, which is more than 800 years earlier than that in Europe. Qian Jin Fang, written by Sun Simiao, a famous medical scientist, recorded more than 800 kinds of drugs and more than 5,000 prescriptions, which developed the medical knowledge of physicians in past dynasties. Later people called him "the King of Medicine". Li Shizhen, a medical scientist in Ming Dynasty, wrote Compendium of Materia Medica, which recorded more than 1800 drugs and more than 10000 prescriptions, and summarized the pharmaceutical research in China. Compendium of Materia Medica was the richest and most detailed drug book in the world at that time. Later, it was translated into more than 18 languages and became the most important document in the world, ranking among the best in the world. Astronomically speaking, China had a calendar in the Xia Dynasty.
Shang dynasty knew that there were twelve months in a year and thirteen months in leap years. Businessmen have known many constellations and recorded the earliest solar eclipse in the world. The 33 solar eclipses observed by terrestrial astronomers in the Spring and Autumn Period are reliable. In July 6 13 BC, they observed "a satellite entering the Beidou", leaving the earliest record of Halley's comet in the world. The Shi Gan Xing Jing written by Gander and Shi Shen in the Warring States Period is the earliest astronomical work in the world.
Zhang Heng, a scientist in the Eastern Han Dynasty, made the earliest seismograph in the world in 132, more than 700 years before Europe. Under his initiative and leadership, the astronomer monk and his party in the Tang Dynasty set up 13 astronomical observation sites all over the country and measured the length of meridian, which was the first practical activity of measuring meridian in the world. Guoyuan Shoujing once presided over the national astronomical survey, with the northernmost point in the North Sea, in today's Siberia, and the southernmost point in the South China Sea and in today's Xisha Islands. He calculated that there were 365. 2425 days a year, only 26 seconds short of the actual time for the earth to go around the sun. He compiled a timing calendar, which has the same period as the current Gregorian calendar, that is, the Gregorian calendar. The timing calendar was compiled 300 years earlier than the current Gregorian calendar. In mathematics, the Western Zhou Dynasty in China has developed into an independent discipline.
Written before the first century BC, The Parallel Computing Classics of the Zhou Dynasty recorded Shang Gao's Pythagorean Theorem of "Three Strands, Four Strings and Five" in the early years of the Western Zhou Dynasty. The multiplication table 199 multiplication table was invented in the Spring and Autumn Period. The famous works of the Western Han Dynasty include Nine Chapters of Arithmetic. Liu Wei, a mathematician in the Three Kingdoms period, calculated the approximate value of pi as 3. 14 16. Zu Chongzhi, a native of the Southern and Northern Dynasties, made the value of pi accurate to seven digits after the decimal point, that is, between three, for the first time in the world. 14 15926 and 3. 14 15927, more than 1 100 years earlier than Europe. His mathematical monograph "Composition" was designated as a school textbook in the Tang Dynasty, and was later adopted by Japan and North Korea.