"Big" does not mean that the school has a large area, many students and rich campus culture, which can accommodate many things that can make people knowledgeable. The thicker the cultural background, the stronger the learning atmosphere and the more "big"; "Learning" is not the rote memorization of book knowledge, nor the review of knowledge taught by teachers, but the integration of life and knowledge. The ability to learn to make a living is not limited to books, but also comes from books.