Ji Changsheng is a righteous young hero who is reasonable and humanitarian.
Surrender without killing, treat prisoners kindly, that's the basic conduct of a righteous young hero.
Since the Eldest Princess has surrendered, Ji Changsheng, of course, cannot kill them all.
At least until he obtains the definite evidence of Eldest Princess's guilt, he cannot kill them all.
"Elder Brother Cao, what do you think?"
Ji Changsheng looked at Cao Ziming.
Cao Ziming took a deep breath, extremely angry to the point of laughter, "This Demon Woman does not shed tears until she sees the coffin, until this moment she is still trying to sow discord between my trust with Junior Brother Ji, she is trying to block the mouths of the world."
Eldest Princess was furious, "Cao Ziming, don't spit blood. All of this is the illusion you created. You used illusions to frame me. Everyone including Elder Ji has been deceived by you."
"What?"
Ji Changsheng looked at Cao Ziming "surprisingly."