The young man was a patient, with a heart condition, but he was smart and quite astute; seeing her expression, he understood and offered some inside information, "Here, there are three directors."
It's quite normal for a department to have three directors, one chief and two deputies. Generally, the directors are heavily involved in administrative work, and it can be challenging to have them lead in tackling technical issues. The really valuable technical doctors, especially surgeons, often prefer not to become directors during their "Golden Period" of life. Of course, there are also highly skilled directors. Such directors are rare—the true power players are hard to find.
"There are quite a few younger chief surgeons," said the young man, confirming this unwritten rule, "Doctor Fu seems very young."