《汉书·志·食货志下》
式当上御史大夫后，看到郡国大多反映政府不便作盐铁，铁器质量差，价格贵，有的强迫百姓购买。
式既在位，见郡国多不便县官作盐铁，器苦恶，贾贵，或强令民买之。
Once Shi stepped into the position, he noticed that most states and counties complained about inadequate government support for salt and iron. Iron products were of poor quality and expensive; some states forced commoners to make purchases. 