Following the zs technique taught to him by Mies, the old man tied a long rope to the pistol, tied a stone to the other end of the rope, and let the stone hang from the small window in the cabin to the window. When everything was ready, he shot himself in the head, and when he died, the pistol that had been thrown out of his hand would be pulled through the small window and fall into the sea due to the weight of the stone. In addition, Mies also taught him more advanced skills, in order to prevent the police from pulling the trigger from the old man pulling the trigger to detect the gunpowder reaction and be recognized by the disguise, so in order to prevent the hands of gunpowder particles, he also let the old man shoot with a handkerchief to wrap the gun hand, in order to be able to make the handkerchief also fall into the sea with the pistol, the handkerchief was also tied to the rope. In this way, zs will not find any traces later.