After getting killed, Cheng Jun is put in to horizontal position on his back with his arms at his sides, then, when he was put over the burning charcoals, first his legs were folded at the knees, arms also hanging sideways but bent at elbows. After heating his dead body for two days, his arms were tied above his head bent at elbows. Then, after knowing about him having had sex with Ya Shi, Zhang cuts those ropes and the dead body falls softly on the floor, and move smoothly. All this cannot happen after rigor sets in, that takes maximum 4 hours. Then, body becomes rigid, joints are set in whatever position they are, and cannot more, will get broken if forcibly moved.