Nowadays, there are fewer and fewer mathematicians, and it is even more difficult to find mathematicians who devote themselves to research and serve the country like Hua Lao. Many people don't want to enter the field of mathematics, because it is difficult to produce results and get economic returns. In addition, the country does not have strong special policy support for talents in mathematics, so personally, there are relatively fewer and fewer people who really devote themselves to mathematics research.