《管子·国蓄》
再观察物价的涨落而用平准之法来控制。这样，即可以调剂物价高低，君主又能够得其好处。
视物之轻重而御之以准，故贵贱可调而君得其利。
Observing again the rise and fall of prices, and using the law of equilibrium to adjust. In this way, the rise and fall of prices can be adjusted, and the monarch can also get its advantages.