There's an old saying that goes: when insulting, don't expose shortcomings; when hitting, don't hit the face.
If the face represents a man's dignity, then having his face hit means his dignity has been trampled on, which is humiliating.
Moreover, the Elder of Qiluo Mountain does not represent himself alone but the Ancient Martial Arts Sect, Qiluo Mountain, behind him.
This means that, although the hit was on his face, it's not just hitting his face; it's not only trampling his dignity but also humiliating Qiluo Mountain.
Yet, he was hit so hard he couldn't even fight back; he was completely powerless to retaliate.
The Elder of Qiluo Mountain was beaten by Hao Jian and just sat dumbfounded on the ground.
"Qiluo Mountain? Sounds impressive!" Hao Jian said.
Knowing their sect's Elder had been hit to the point of being unable to fight back, those brought by the Elder of Qiluo Mountain were too scared to move.
