From 9: 00 a.m. to 9: 00 p.m., self-service library Goodwill Bookstore is the first free self-service library in our city that can provide 24-hour all-weather service. The building covers an area of about 1.40 square meters, and there are more than 1,000 paper books 1. There is a reading area for adults and children. Readers only need to swipe their cards with their ID cards or library cards, and they can borrow and return them by themselves with their library cards. During the experiment, the service time is from 9 am to 9 pm every day.