Sanyuan Book Bar is a bookstore that provides sales and services of all kinds of books. Generally speaking, Sanyuan Book Bar can sell various types of books, including but not limited to the following categories:

1. Literature: novels, poetry collections, essay collections, etc.

2. Humanities and social sciences: history, philosophy, sociology, psychology, economics, etc.

3. Science and technology: natural sciences, computers, engineering technology, medicine, etc.

4. Educational categories: educational textbooks, subject supplementary textbooks, examination materials, etc.

5. Lifestyle categories: cooking, health, parenting, travel, etc.

6. Arts: art, music, dance, photography, etc.