In front of Mozi, who represented the little state of Song, Gongshu, a master craftsman from the large state of Chu, took out model scaling ladders to demonstrate a simulated attack. Mozi, unperturbed, loosened his belt and set it up as a model city wall. He drew a piece of bamboo out from the bamboo writing slips to symbolize a weapon.
在代表小國宋國的墨子面前，大國楚國的巧匠公輸般拿出雲梯攻擊演練，墨子則不慌不忙地解下腰帶做為城池應戰，並從竹簡拆下竹片象徵武器。