The commander held hostage by Chu Yang remained unconscious, oblivious to the events transpiring around him.
Chu Yang did not intend to kill him.
He was not afraid of killing people; it was a task which he did not find particularly difficult. Rather, he was more concerned about getting out of his current predicament and avoiding any possible danger, as well as confirming his suspicions about where his enemies were from!
Chu Yang guessed that they were probably from Iron Cloud! More specifically, they were likely Prince Tie Butian's Dead Warriors.
They were the only ones who wanted to prevent Du Shi Qing from reaching Iron Cloud! That was because if Du Shi Qing miraculously restored Tie Shi Cheng's health, the Iron Cloud country would be trapped by the perilous situation of having two kings.