If the price is adjusted, an extra code must be added after the original barcode. Reprinted books should indicate the printing times in the version record, and each reprint should be recorded once and accumulated one by one. The number of reprinted books is also accumulated from the first printing of the first edition. When a book is reprinted, the layout, book number and layout remain unchanged, but the cover and main title page (title page) can be redesigned. The Chinese standard book number bar code of general books remains unchanged, but if the pricing is adjusted, an additional code must be added after the original bar code (the whole bar code needs to be reapplied).