画饼充饥

Origin and story

In the Records of the Three Kingdoms' biography of Lu Yu, Emperor Ming of Wei discusses how to select officials. He warns against relying on an impressive reputation alone, comparing such fame to a cake drawn on the ground: it cannot be eaten. Lu Yu responds that reputation may reveal ordinary qualities, while exceptional talent still requires examination.

The exchange is about evaluating people, not a report that someone literally tried to eat a drawing. The later idiom compresses the emperor's comparison into drawing food to satisfy hunger. It now describes empty promises, imaginary solutions, or consoling oneself with something that cannot meet a real need.