《隋书·列传·卷十一》
冀州民俗薄巧，市井上多有奸诈，赵煚制造铜斗、铁尺，放在街上，百姓以此为方便。
冀州谷薄，市井多奸诈，煚为铜斗铁尺，置之于肆，百姓便之。
The folk customs in Jizhou were rather scheming, and there was much fraud and deception in the market; Zhao Bo had bronze buckets and iron rulers made and placed in the street, which made it convenient for the people.