Qingchen knows this thing, which is specially used to prevent suicides of extraordinary people below the level, and it is impossible for prisoners to break free from the inside after wearing it.,at this time, Qingchen felt someone approaching in the cabin. He closed his eyes and carefully analyzed the breathing sound of 21 people in the Class A floating airship, including four pilots.,there is a saying that it is very difficult for ordinary people to memorize this thing temporarily.。