When libraries recruit cleaners, they usually post recruitment brochures in study rooms and other places, or publish recruitment resumes in the same city in May and August. After all, the cleaner is not an important position in the library. I often go to the Shandong Provincial Library, and their cleaner recruitment is to post a recruitment brochure at the door or in the study room. After all, there are many people in the study room, so it is convenient for learners to spread.