1. First of all, if there are mistakes because of individual words, particularly important words, or a paragraph, you can reprint this paragraph and try your best to remedy it.

2. Secondly, if the wrong page is printed, which leads to the wrong direction reversal, it needs to be checked and reprinted before binding.

3. Finally, if a printing error is found after binding, you can only disassemble and re-print the wrong page, and then re-bind.