Promotion and Improvement of Successful Glasses In the early days, China's glasses were imported and expensive. [5] Sun saw that many people had difficulties in life because of vision problems, so he successfully made glasses himself. In order to develop, he went to Hangzhou to study optics, and invited a group of Hangzhou scholars to Suzhou to discuss together, and combined with western learning, he mastered the technology of "grinding the film into light". On this basis, he used crystal instead of glass as raw material, changed the past "one-sided mirror" (that is, a single lens in his hand "a mirror") into the way used on the bridge of the nose, and polished it into 24 different concave-convex lenses for customers to try on and "match glasses", which was very popular in the country. Under his influence on the manufacture and improvement of glasses, Suzhou glasses workshop began to flourish.
Later, Sun taught these skills to Chu Sanshan, a native of Suzhou. During this period, glasses quickly swept the country, and the price dropped rapidly, selling well in Japan and becoming an important commodity exported to Japan. Later, a large number of glass workshops were formed in the suburbs of Suzhou. After several relocations, they finally formed a glasses distribution center in the country.
Catholic Jesuit missionaries went to China to preach and brought a lot of knowledge about western optics. Among them, Tang Ruowang's "Theory of Telescope" is the first book to systematically introduce telescope making and related optical principles to China, which also inspired Sun. Although Sun's History of Mirrors has some references, it is mostly practical experience. At the same time, the history of the mirror has also been influenced by Bojue. Sun recorded various optical instruments with different functions in his book. It was the first optical treatise written by China people, and its optical instruments had a far-reaching influence at that time. In order to commemorate him, people specially displayed his invention story in Suzhou Museum.