Abstract: A versatile packaging box for products, which can be folded into a book cover or an envelope for the contained book, is disclosed. On its front, rear, left and right vertical panels a folding line whose position is adapted to the thickness of the contained book is respectively provided. The front, rear, left and right vertical panels are provided with foldable end panels. The height of the part of the left and right vertical panels above the fold line and below the end panel and the length of end panel add up to the length of the front cover of said book. When the end panel is folded onto the inner side of the rear and front vertical panels, the height of the part of the rear and front vertical panel above the fold line and below the end panel is equal to the width of the front cover of said book. The packaging box has the advantages as follows: making full use of the used packaging box, beautifying and protecting the contained book, and reducing waste.

Abstract: A versatile packaging box for products, which can be folded into a book cover or an envelope for the contained book, is disclosed. On its front, rear, left and right vertical panels a folding line whose position is adapted to the thickness of the contained book is respectively provided. The front, rear, left and right vertical panels are provided with foldable end panels. The height of the part of the left and right vertical panels above the fold line and below the end panel and the length of end panel add up to the length of the front cover of said book. When the end panel is folded onto the inner side of the rear and front vertical panels, the height of the part of the rear and front vertical panel above the fold line and below the end panel is equal to the width of the front cover of said book. The packaging box has the advantages as follows: making full use of the used packaging box, beautifying and protecting the contained book, and reducing waste.