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Open QuestionsHow Chinese science and technology have influenced the West … and vice versa

Historian Han Qi on why the exchange of scientific knowledge is so important – from astronomy and salt wells to high-speed trains

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Illustration: Lau Ka-kuen
Victoria Bela
Han Qi is a professor of Chinese history and culture at Hong Kong Polytechnic University. He has published a large body of work on East-West cultural exchanges in history – in particular the transmission of science between China and Europe. This interview first appeared in SCMP Plus. For other interviews in the Open Questions series, click here.

In what ways has Chinese scientific knowledge influenced Western scientists – especially in fields that are still salient today?

There are people who believe that China only has traditions in technology, but not in science. However, in fields like astronomy, China actually has a very long tradition of astronomical observation dating back more than 2,000 years. China has the longest and most complete records of astronomical observations, including solar and lunar eclipses, and records of stars, meteors and supernovas. Europeans do not have the same level of observational astronomy records, so Chinese records have actually had an influence on the West.

In the 17th and 18th centuries, many people began to study the universe. For a long time both Western and Chinese astronomers were not sure about the changing rule of the values of the obliquity of the ecliptic. In 1722, a French Jesuit missionary named Antoine Gaubil arrived in Beijing and checked over numerous Chinese historical records. After compiling the records, he sent them to France. In the early 19th century, there was a famous French astronomer and mathematician named Pierre-Simon Laplace who read the compiled manuscript and performed some calculations and conducted research based on it. This was a way in which Chinese astronomical observations have had a very direct impact on science up until today.

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