You can check the book you need through Douban (www.douban.com) or Dangdang, Amazon and other commercial websites to find out its contents and determine whether you need this book.

If necessary, copy the title and isbn of this book.

When you arrive at the Shanghai Library, enter the title or isbn of the library you need on the retrieval computer in the catalog hall, find the information of this book, and click "Send for Book". After the book request information is sent out, the computer will give you a book retrieval number. Wait in the library for about half an hour, and after seeing your own book retrieval number on the big screen of reference lending, you can go to the counter to get the book.

A large number of books in Shanghai Library are borrowed for reference. You will like this way after you get used to it. After all, it is very difficult to open all those books.