It's actually quite funny when you think about it, how a man in his fifties can lower his stance so much in front of a young person. Moreover, what's key is that he does it with such earnest sincerity. His appearance may be that of someone in his fifties, but his mentality is like that of a child. And it's such a person who through his actions demonstrates the saying that learning has no end, and medical skill is boundless.
One should never stop the resolve to keep moving forward at any time.
Li Fei made his point clear when he said this to him: as a medical practitioner, you must carry a heart of reverence. If you haven't even fully researched those things yourself, what right do you have to put them into practice? And what right do you have to earn people's trust, let alone make these people your guinea pigs?