The figure of Shun working the fields of Mount Li, plowing alongside elephants who came of their own accord, is the image this stick hands you. He had every reason to grow bitter, every reason to keep score. He didn't. The verse points back at the quiet decency you've been practicing without much applause, the times you chose not to retaliate, the patience you've extended to people who didn't quite deserve it. You may feel unseen right now, even taken for granted. The stick reflects something different back: a reputation is forming around you in rooms you haven't entered yet.
What 中吉 means here is that the harvest is real but slow. You're in the field-tilling phase, not the throne-receiving phase. The danger at this stage is impatience, the urge to start cataloguing your own goodness, to drop hints, to make sure people notice. The moment Shun had needed an audience, the elephants would have wandered off. Your task now is to keep doing the unglamorous, decent thing without auditing whether it's being repaid. The doors open later, and they open because the work was done when nobody was watching.