Social changes at the turn of the Spring and Autumn period and the Warring States period gave artisans some freedom and opportunities to exercise their talents. In this context, Lu Ban invented machinery, civil engineering, and handcrafts. Today, the hand tools used by carpenters, such as saws, drills, planes, shovels, curved tools, and inkpots for scribing, were all, according to legend, invented by Lu Ban. And the invention of each tool is Lu Ban in the production practice to get inspired, after repeated research, test out.