Introduction to the escape wall: One year, continuous rainfall in the Gelesan area washed away a wall in Zhazidong, and the guards ordered the revolutionaries in the prison to repair it. When repairing walls, these revolutionaries used rotten cotton from their clothes and mixed it with the soil to make the soil less sticky and less solid. During the massacre, when the revolutionaries escaped the machine gun fire of the agents, they knocked down this wall and escaped successfully.