The title page of this book, one after the other, is usually made of white paper, but in fact it has four title pages, only two of which penetrate the cover, so we see two, the first one is at the beginning of the previous content and the last one is at the end of the content.

The title page of this book is mainly embodied in paperback and paperback. Paperback, the first cover page is inserted in the envelope with a sealing plate, and the last cover page is inserted in the envelope with a sealing plate.