C624 Hero Yang's Viciousness

"When he said he was going to do an experiment, he told us that there would be poisonous gas in the room, so he didn't let us in. Not long after, the room was filled with smoke, so we believed him. When the smoke dissipated, we found out that it was self-made smoke. We had no choice but to send the guards to check on him. He had been in contact with the outside world for more than twenty minutes