He is the God of Sniper

After Xu Cheng finished talking, he turned around indifferently and said, "Mario, get rid of them."

"Yes, Boss!" Mario raised his gun and was about to finish these guys off. 

At this time, that captive immediately said, "You want to kill us because you don't trust us, and you don't want us to be alive to get the words out there, right? Because if that happens, many forces would be coming here to try and conquer this place, and the Polar Bears would send an army over. But, you think that even if you kill us all, there wouldn't be anyone that slipped past you guys and fled this place to spread the news?"

Xu Cheng suddenly turned around. "Oh right, I almost forgot if you didn't remind me."

He stared the captive right in the eyes. "Since you dared to say this, that means you know that there are still a few members of your clan that aren't here nor dead, right?"