On October 1, 2018, Xiamen Municipal Library (Jimei), the largest single public library in Fujian Province, opened on trial, with a building area of 60000 square meters and a total collection of 3 million books. It has a full self-service library with intelligent bookshelves, which can return books to the shelves in real time. The "you read, I pay" book collection cabinet was also China's leading scale project of book collection cabinet at that time. The 24-hour self-service book returning machine and 22-level intelligent sorting system make readers return books outside the library when it is closed. The accurate bluetooth positioning and navigation technology of the whole library keep readers from getting lost......