You can read books outside of your duties, that is, books outside the classroom. Don’t just stick to the books in the classroom.
Young people who love reading can read books outside of their duties, that is, books outside the classroom. Don’t just stick to the books in class. ...After completing the homework you should do and having some spare time, you can read various books, even those that have nothing to do with your profession. For example, those who study science tend to read literature books, and those who study literature prefer to read science books to see what other people are studying there. In this way, you can have a deeper understanding of other people and other things. ——Lu Xun, "The Complete Works of Lu Xun", Volume 8, Page 439