Fill in the whereabouts of the books off the shelf according to the real whereabouts. According to the relevant public information, the books removed from the shelves will be handled by means of transfer, exchange, discount and scrapping. After re-selection, you need to fill in the destination truthfully. Withdrawing books means that the borrowing department removes some damaged, destroyed, outdated and underutilized books from the shelves every year for updating. Shelf lending is an important standardization work in the library.