Jizi thereupon said: “I once heard that Gun misused the five elements, i.e., wood, fire, earth, metal and water, in his efforts to control the floods. The Ruler of Heaven was furious and deprived him of all the Nine Great Rules. As a result, the constant laws of statecraft fell into ruin. Gun was exiled until his death. His son Yu took over his father’s duties and became very successful in harnessing the floods. Heaven bestowed the Nine Great Rules on him. Consequently, the constant laws of statecraft were restored to order.” (The Book of History)