It is all kinds of books that have been copied, carved or otherwise formed. For example, updated version, reduced version and revised version.

Number of words: the number of words is calculated in units of faces, and the number of rows × rows × faces (tables and figures are calculated as a whole page). Printing: Calculate the length of published books, and the total number of pages is in book format. ISBN number: ISBN-978-7-5064-2595-5978 refers to the book product code.