Future study

I want to invent something in the future, what? That is the study, what facilities are there in the study? Let me tell you now! If someone borrows a book from you, but does not return after the specified time, the book will give an alarm. If you have a twisted foot or a disabled person, you know how much benefit you have. If you don’t want to take the book, just use it. Pick up the remote control, press the "Open" button, and say the book you want to see against the remote control. The book will fly from the bookshelf to your hand. If you don't have a hand, the book will stop in front of you. How? Turn the book? Don't worry, as long as you say the next page, the book will automatically turn to the next page. When you see the last page, the book will fly back to the bookshelf. There is also a facility that will make you puzzling. If you are very touched after reading the book, or want to leave a message, if you say that you want to leave a message, it will automatically write what you said on the last page. I said that the future study is not in line with your "flavors". If it doesn't suit your "flavors," give me some advice!

Fourth grade: Han Zao