Resisting the urge to interfere with technical and business personnel is already a sign of a top-tier leader. What more can Xu Qing possibly ask for?
Moreover, due to Shen Mo's special identity, unless he wishes to be transferred, nobody else can easily touch him.
After all, he is the "Crown Prince's" teacher. Once Prince Yu ascends to the throne, not to mention joining the cabinet, becoming the Grand Secretary is a matter of course.
Even if Prince Yu does not like this teacher, he has to reward his services.
Otherwise, what would others think of Prince Yu?
Ungrateful and mean?
If you don't even reward your own teacher, does that mean you also plan not to repay those of us who helped you rise?
Furthermore, Shen Mo, as Prince Yu's teacher, submitting a petition to attack his own disciple Xu Qing created some estrangement between them, which, paradoxically, has a wonderful effect that's indescribable.