Shen Bing, who was dressed as a Nanzheng craftsman, was stunned on the spot with his "Dragon Soldier" identity card in his hand. Zhao Ren was singing Qin songs at the top of the city to engage in psychological warfare. His master opened the curtain and pointed outwards. Shen Bing looked in the direction and saw two iron cannons set up in front of the camp: "Can these things be used?"