Natural science stacks (fifth floor of the library). There are natural science stacks (the fifth floor of the library), China social science stacks (the fourth floor of the library), Chinese medicine stacks (the third floor of the library), sample stacks (the third floor of the library) and thread-bound stacks of ancient books (the second floor of the library) in the East District Library. There are comprehensive stacks (first floor), medical and health stacks (second floor), foreign language stacks (fourth floor) and second-line stacks (fourth floor) in the West District Library.