C2048 Source

"How did this happen?" Yue Yi looked at him. Ren Nanfeng smiled casually: "You think it's my blood? Wrong, it's their blood. What Iron Slaying World, it's too weak. When I went there, almost no one noticed. When I started killing, they were slow to notice. Heh heh, will your later worlds be so weak? "

According to his experience, Ren Nanfeng was an old man. The first time they met