1. Old books bought from the bookstore can't be inserted directly into the bookshelf. Soak a soft and clean towel in a little disinfectant and a proper amount of detergent, dry it with a washing machine and gently wipe the spine (back) and front and back covers (covers). Then wipe it with a soft dry towel. Gently brush off the dust on the book head (also called the book head) with a small brush with moderate hardness, and then wipe the book head, book mouth and book root with a soft and clean towel. Then expose the book. Choose a sunny day for books bought in spring and autumn, and expose the books in the sun for 2 hours. Those bought in summer can be exposed to the sun for 30 minutes. You can be exposed to the sun for 2 to 3 hours in winter. Old books processed by this program can be safely inserted into bookshelves.

2. It is best to choose a wooden bookcase, and the glass door is tightly sealed to prevent dust from invading.

It is best to cover the upper part of the book brain stored in the bookcase with newspaper.

4. Old books stored in the bookcase, books from the fifties and sixties, it is best to be exposed for 2 hours on sunny days in winter.

5. The study should be ventilated frequently.