Some old sayings never go out of style, like "one kind of soil can nurture a hundred kinds of people."
Both are professors, but Professor Qi, whether with himself or others, is so traditional as to be almost harsh. The reason he treats Yan Fei well can only be chalked up to good timing. If Yan Fei had met Professor Qi a few years earlier, wanting to establish a close relationship with him would have been difficult, considering Professor Qi's usual stern demeanor that rarely even includes a smile.
Professor He, on the other hand, is strict only with work-related issues, or should say, matters of major importance, but he isn't as demanding when it comes to his private life; he's even somewhat capricious, like an old child.
Compared with the two of them, Professor Shu is a bit more "pragmatic." But this "pragmatism" isn't negative—it's all in the interest of teaching students better.
