"You think you've killed me?"

That sentence had double implications. The first one was to question if Li Mu really killed him after cutting his head off. The second was to reveal that he was that Emperor Qin Ming Li Mu mistakenly believed he had killed months ago.

Li Mu tilted his head to one side and pondered over it for a second before he ascertained that the head on the ground meant the second one.

Celestial Demon Emperor was Emperor Qin ...