C2224 It Was so Dangerous That He Nearly Exposed His Identity

Hearing Liu Lei's voice, Chen Chuncai was first shocked, but after listening to it, he understood.

So the communication method that Liu Lei used was called Sound Transmission Technique, it was the same as the method that Artificial Demon in Black Robe used before.

It won't be heard by anyone else.

Sure enough, Chen Chuncai turned around and looked at Artificial Demon in Black Robe