物勒工名，以考其诚: “Engrave the maker’s name on the object, to examine his sincerity.” The line appears in the Lüshi Chunqiu and, in a slightly different form, in the Book of Rites. It goes on: “If the work is not right, his crime must be punished, to get to the bottom of it.”
Qin law had a related rule. A statute on the bamboo slips found at Shuihudi orders that state armor and weapons be engraved with the name of the office responsible for them. Another fines the official in charge one shield when state vessels are not engraved.