The books in the cafe are actually the books in the city library. Ask the waiter who actually doesn't know the source of the books?

The books in the cafe for customers to read are actually the books in the collection of Hefei City Library. Do you need to return these books? Last Saturday, when Mr. Jiang went to a cafe in the city to consume, he opened the literary books on the table at will, but found that these books were stamped with the seal of Hefei Library. Mr. Jiang found that nearly 500 books in the cafe were collected by Hefei Library.