Linguistics certainly has applications. For example, experimental phonetics led by Li Aijun, a researcher in our institute, is very influential abroad, and it is at least one of the top three in China, as well as Chinese teaching, pragmatics and lexicography. But mainly basic subjects, in other words, most of them are not used for the time being. However, dialectics should be emphasized on this issue, which is not static. Mathematician Chen Shengshen cited the example of regular polyhedron research: "Some people may think that mathematicians do nothing all day and make nothing out of nothing. What's the point of making these polyhedrons? " I think titanium compounds in chemistry now have something to do with regular polyhedrons. That is to say, after 2000, regular polyhedron will be useful in chemistry, and some mathematicians are studying the relationship between regular polyhedron and molecular structure. We now know that biological viruses also have the shape of regular polyhedrons. This shows that a mathematician's "fantasy" has turned into "practicality" after such a long time. Chen Shengshen: Mathematics is very energetic. Did you see it? It took 2000 years. The mathematicians who studied before 2000 have accumulated great virtues, which will be the future generations.

We China people are beautiful and mysterious, and the truth inside is far from being understood. Chinese has unique value in the typology of human language. If we dig deeply, it will not only be meaningful to China, but also contribute to all mankind. Since Ma Shi's Wen Tong, China people have made little contribution to the ontology theory of linguistics, mainly Zhao Yuanren's vocabulary diffusion theory and Wang Shiyuan's vocabulary diffusion theory, and the rest seem to be nothing. Moreover, we haven't had language philosophers in China for a long time. They are all ancient people. I am embarrassed to tell foreigners that I am also a famous scholar's grandson. Therefore, all of us, as well as you, have a great responsibility. Everyone must be promising in order to be worthy of the brand of the Language Institute and those old-timers who start businesses.

Students, please work hard!