I already can see this fl's head flying faraway. How can she be this dumb? Even if the demon keep himself to the promise, and don't hurt Su Lüxia, he will kill everybody else, because why not, this is war. And I think his first thing will be killing the ml, because he is his rival.
This manhua is one of my best, but constantly made me remember, why I don't like a lot of the chinese stories. Because there just too much dumbass kind of logic. (And the diamond, or at least the gold disappear among these stories)