Borrowed non-literary books that need to be used after expiration are generally allowed to be renewed. The reason is that because these books are still of high use value, readers may need more time to study or complete tasks related to these books. By renewing books, readers can prolong the use time of books, improve the utilization rate of books and improve the learning efficiency of readers. At the same time, the library also hopes to improve readers' satisfaction and loyalty through the renewal service, and promote the interaction and cooperation between the library and readers.