It's simple. How many books can people in various remote and underdeveloped areas in China read? And now the internet is so popular that many people read electronic documents, and reading electronic documents does not count. Then there are people like me. I am the kind of person who can't read books. I can read science and history, but I can't read literature. As far as Chinese is concerned, I have only seen the Three Kingdoms completely, and I only got a complete understanding through related TV dramas, movies, animations and online novels. I can't just read the original. Then I studied in America and couldn't understand English novels, let alone deeper ones. Think about people like me going abroad, let alone at home.