What are the achievements of ancient science and technology in China?

China has made many important achievements in ancient science and technology. Here are some of them:

1. Four Great Inventions: The four most influential inventions in ancient China, including papermaking, compass, gunpowder and printing.

2. Water conservancy projects: China developed many water conservancy projects in ancient times, such as irrigation systems, waterwheels and sluices, which provided great support for agricultural production and social development.

3. Astronomy and Mathematics: In ancient China, there was a deep study of astronomy and mathematics, and outstanding achievements were made in the field of astronomy, such as 24 solar terms, astronomical observation and sundials.

4. Medicine: China has made rich achievements in ancient medicine, such as Huangdi Neijing and Treatise on Febrile Diseases, which are regarded as classics of Chinese medicine.

5. Craft manufacturing: China ancient craft manufacturing technology is also very advanced, such as bronzes, ceramics, silk, etc. , are all famous.

These ancient scientific and technological achievements have promoted the economic, cultural and social development of China to varying degrees, and also made important contributions to the progress of human civilization.