The verse shows Cao Cao opening a beautiful box and finding only dried peel inside, then drawing his sword on a giver who has already slipped away as a sheep in the flock. As a Poor grade reading, the stick is holding up that scene as a mirror. Something in your current life looked like a tangerine box from the outside: a role, a relationship, an opportunity, a plan you put weight on. You opened it and the contents were not what was advertised. The anger or disappointment you feel right now is real, and the stick does not dismiss it.
What the verse reflects back, though, is the second half of the scene. Cao Cao's sword never lands on anything useful; he swings at a sheep and looks foolish in front of his own court. The stick is asking you to notice where you are about to swing. The person or situation that disappointed you may already be out of reach, shape-shifted into something you cannot meaningfully strike at, and the energy of the swing will mostly land on people standing nearby — a partner, a colleague, your own reputation. The deeper reading here is that the empty box was partly built by what you assumed would be inside it, and that assumption is the part you can actually examine.