《史记·七十列传·平津侯主父列传》
秦朝又让天下百姓飞速转运粮草，从黄县、腄县和琅邪郡靠海的县城起运，转运到北河，一般说来运三十钟粮食才能得到一石。
又使天下蜚刍輓粟，起於黄、腄、琅邪负海之郡，转输北河，率三十锺而致一石。
The Qin Dynasty forced the people to quickly transport grain, shipping it from the counties of Huang, Bi, and Langye that were near the sea to the Bei River. Generally, transporting 30 hu of grain would yield 1 shi.