Nail your fingers with a bamboo stick. The sign in Jiang Jie refers to Jiang Jie being tortured with a bamboo stick between his fingers after he was arrested. Connect bamboo chopsticks with hemp rope, hold the prisoner's ten fingers one by one with bamboo chopsticks, and the left and right people hold the hemp rope. When bamboo chopsticks exert force, they will hold the phalanges.