《管子·山国轨》
管仲说： 用盐铁的收入来办理统计理财事业，可以使粮食经过囤积而一涨为十，国家得利九倍，人民还照常衣食服役，安而无怨。
管子曰： 盐铁抚轨，谷一廪十，君常操九，民衣食而繇，下安无怨咎。
Guan Zhong said: Using the income from salt and iron to manage the statistical and financial affairs can make the food increase tenfold after hoarding, and the country will make nine times more profit, and the people will still eat, dress and serve as usual, and live in peace and without complaint.