Packaging box showing different open and closed images, method of preparing the same, and applications of the same

A packaging box showing different images when open and closed, comprising an outer box body and an inner box body, a display window on an upper face of the outer box body, and different images displayed in the display window on an unfolded surface or a closed surface, wherein:

• the unfolded surface is fixed in the display window, and opening and closing the inner box body drives lateral movement of the closed surface to display a first image on the unfolded surface or a second image on the closed surface in the display window,
• the unfolded surface has first and second edges bonded to an unfolded surface frame body,
• the unfolded surface frame body has first and second edges bonded to an upper wall of the outer box body, with a first gap between the unfolded surface frame body and the upper wall of the outer box body,
• the closed surface has first and second edges bonded to a sliding plate or sheet,
• the sliding plate or sheet is in the first gap between the unfolded surface frame body and the upper wall of the outer box body, and opening and closing the inner box body drives the sliding plate or sheet to slide laterally in the gap′
• the unfolded surface frame body is substantially rectangular, with a rectangular cut-out in one end and a square opening near an edge of an opposite end,
• the opening has a length not less than a depth of the cut-out,
• the sliding plate or sheet is rectangular and has a length and a width less than a corresponding length and a corresponding width of the unfolded surface frame body,
• the sliding plate or sheet has a bent card at one end and a locking strip at an opposite end,
• the card passes through the cut-out and is perpendicularly connected to the sliding plate or sheet, and
• the locking strip is in the opening.