In fact, the validity of a paper generally depends on the number of years of professional title evaluation. No matter any profession or industry has professional titles, we will call them junior professional titles, intermediate professional titles and senior professional titles for the time being. Generally speaking, there is no need to publish a paper to evaluate junior professional titles. As long as you have your own education, years of work, and have achieved certain academic results in the course of your work, you don't need to publish academic papers. Generally, it is necessary to publish academic papers to promote intermediate titles and senior titles. What needs to be emphasized here is that the academic papers published when promoted to intermediate titles have been used and cannot be used again when promoted to senior titles. Promotion of senior titles requires the publication of new academic papers.