"Then you don't know what philosophy is. Philosophy and science are useless. However, the development of science and technology does not mean that science and philosophy are useful. What needs to be clear is that philosophy and science are both researches on objective matter and logic, while technology is the research on the application of subjective matter, so there is no comparability between them. But science and philosophy are the prerequisites for the application of technology. Technology cannot be separated from philosophy and science. Technology divorced from science and philosophy is the study of idealism and empiricism. Just like China's four great inventions, they were not developed on the basis of science and philosophy, nor did they have the thought of Zhe Ke system. Therefore, China's four great inventions, no matter how great they are, are at best experience and technology, and have not formed theoretical things. Studying philosophy and studying philosophy can't be regarded as a proper career. It is suggested not to make a fortune by philosophical propaganda, which is against the basic quality of a philosopher. Learning philosophy and studying philosophy are just logical reasoning, deepening self-awareness and spiritual sublimation. It cannot be said that philosophy is not important. On the contrary, philosophy is too important. Throughout the East and West, scientists and inventors are philosophers, at least understand that philosophy is just. As for what kind of people are suitable for studying philosophy, I tell you that those who pursue fame and fortune, those who pursue impetuous emotions, and those who pursue high officials and high salaries cannot become philosophers. At best, they learn basic philosophical knowledge, but that's just kneeling in front of the auditorium of philosophy. Only those who are open-minded, calm, thoughtful, logical, brilliant and pursue a quiet life can learn philosophy and study it, because they have to cut off things that may affect their thinking at any time in their lives.