He starts a little at the sudden backslap, but quickly covers it with another wince and a weak laugh.

Focusing on that means he will not stare at the man's eyes. He does not move like a fierce corpse -- not even one like Wen Ning -- and besides, even the strongest fierce corpse would not have the sheer mass of dark energy Wei Wuxian glimpsed for an instant. It is as if the man is so filled from head to toe that the energy even blots out his eyes, like old stories of the sun being darkened by the moon.

"May I ask your name, xiānshēng?"