There's a saying that goes, "A smile on the face, MMP in the heart!"
Yan Fei's mouth was saying words of apology, but there wasn't a hint of apology on his face.
It's really unnecessary, their attitude is just not right—let's be blunt, they immediately criticize, as if they're ready to slap each other's faces. It's just a matter of who slaps louder, whoever can't, just crawls away; politeness is irrelevant!
It's not about deliberately creating levels or anything, but basically, for people at their level, there's got to be a basic rule of harmony generating wealth. Even if you meet today and plan to throw black bricks at his house at night, you generally won't show it openly.
If they're not even bothering with that now, it must mean they're really ready to tear things apart, so Yan Fei doesn't need to be polite either.