To be fair, executing a suspected spy in front of everyone is a bit overboard.
If it turns out that the person wasn't a spy, the killer, even if they were powerful and had great status, would still face some consequences.
What's crucial is that Feng Jun chose this person from the crowd and struck without hesitation.
Yu Zhengqing of course knew that, thanks to the lighting fixtures, the light outside the courtyard was bright, but night could not compare to day.
Who would dare to kill so boldly without utmost confidence?
Of course, what was more critical to him was that Feng Jun had not killed the wrong person and that the victim was an elite from the Wonderful Hand Pavilion's Dark Hall.
Although the action was a bit too violent—the corpse was a ghastly sight—moving through the martial world, it seems that ruthlessness is, indeed, the righteous path.
As he was pondering this, he suddenly heard Feng Jun sigh, "Alas, I was still a bit too soft-hearted."