Training a qualified doctor is indeed very challenging.
That's why he made the request back then and successfully recruited Tang Yuxin from a myriad of hospitals. As a result, he became the bane of several hospital directors, whose hospital lost the best and most prospective doctor due to him. Even now, an encounter with him was an unpleasant sight for them and they would refrain from speaking with him.
But they didn't understand how much effort he had to invest to manage the best, most promising doctor. He had put in so much effort, even if it meant he had to lose his face. He was willing to be a scapegoat if it made her happy.
But now he lamented over their wasted potential. He had helped her pave the way with the ample resources of the Tong Family, but she disappointed him. As a director, what else could he do?
He had agreed to grant her leave regardless of his personal feelings.