2. Engraving printing was invented in the Sui and Tang Dynasties in China, and the Diamond Sutra printed in the late Tang Dynasty was the earliest engraving printing in the world.

3. Sun Simiao, the drug king of the Tang Dynasty, wrote Qian Jin Fang, which recorded more than 800 kinds of drugs and more than 5,300 kinds of medical prescriptions;

The monk and his party measured the length of meridian for the first time in Tang Dynasty. He is the first person in the world to measure the meridian length of the earth by scientific method. The monk and his party discovered the phenomenon of star motion for the first time, more than 1000 years earlier than Europe;

The Pharmacopoeia of Tang Materia Medica compiled by the Tang government is the first pharmaceutical monograph officially promulgated by the state in the world.

Extended data:

1, Zhao Zhouqiao, also known as Anji Bridge, is located on the Weihe River in Zhao County, Hebei Province, across a river more than 37 meters wide. Because the bridge body is all made of stone, it is called "Dashiqiao" locally.

Built in the 11th to 19th year of Emperor Kai of Sui Dynasty (59 1-599 AD), it was designed and built by the famous craftsman Li Chun, with a history of 1400 years. It is the earliest and most complete ancient single-hole open-shouldered stone arch bridge in the world today. Zhao Zhouqiao is the crystallization of ancient working people's wisdom, which has created a brand-new situation of bridge construction in China.

2. Qian Jin Fang Yao summarized the medical achievements before the Tang Dynasty. The first book, Great Medical Integrity and Great Medicine, is the basis of China's medical ethics. His exposition of "Special Volume of Gynecology and Pediatrics" laid the foundation for the independence of Gynecology and Pediatrics in Song Dynasty. Its treatment of internal diseases advocates "five internal organs as the key link, cold and heat deficiency as the key link"

And created a precedent for the classification of viscera; Among them, the carbuncle of flying corpse (similar to tuberculosis) is classified as lung syndrome and treatment, and it is pointed out that cholera is caused by diet. The description of the prone parts of osteoarthropathy (osteoarthrosis tuberculosis) and the record of the relationship between diabetes and carbuncle all show a high level of understanding. Discussion on acupoint indications.

It provides a guideline for acupuncture treatment, and the selection of Ashi point and the promotion of "same size" are quite helpful to the accuracy of point selection. Therefore, Qian Jin Fang Yao has been attached great importance by later medical scientists. Fang Yao also spread abroad, which had a certain impact.

In the mid-7th century, due to the unification of the country, the economy of the Tang Dynasty recovered and developed rapidly. Moreover, due to the inward migration of northwest minorities, the development of communication and trade in the early Tang Dynasty, and the continuous import of western regions and Indian culture, the number and types of drugs in the Tang Dynasty continued to increase, enriching the content of pharmacology in China.

Compendium of Materia Medica, which was regarded as a treatment guide by doctors at that time, could not meet the needs of the situation at that time because of various shortcomings in compiling Tao and mistakes in copying and correcting it for more than 100 years after Liang. Therefore, it is necessary to summarize and sort out the knowledge of drugs, and the Tang government ordered the compilation of new herbal works.