The journey to and from school is a major reason for stress throughout the world. And the journey can even make you sick. Yet one city has found a way to make its train journeys more comfortable while offering enjoyable reading at the same time, just like in a library.

On two train lines in Beijing, the underground cars (车厢) have been turned into libraries, but they're not traditional libraries . Instead of real copies of books, the underground cars provide e-books.

When passengers get into the cars, they can see pictures of different book covers on the walls and even doors. Passengers can browse(浏览) the books just like in any other library. Once they've made their choice, they can use a mobile phone to scan the QR code(扫二维码)on the cover of their chosen book. The QR code leads to an e-book app on which the passengers can read the e-book for free. And they can still enjoy the book on the app even after leaving the train.

Thanks to the underground's idea, passengers can discover new stories every time they take a ride. In this way, the journey will not be boring any longer, and passengers will not complain about the journey either. Instead, they can benefit(受益）a lot from it.

Reading e-books can really make the journey more enjoyable—it's one of the things that successful passengers usually do. ln fact, in this kind of special library, the books can go on forever!