《梦溪笔谈·官政一》
因此，商人竞相趋鹜，争先恐后，都赶赴极边博籴，故边境粮草常能首先充实起来，不为内地州郡所分占。粮草的价格也因此不能飞涨腾越，各路的税收也都有盈余，这确实是个好办法。
以此商人竞趋争先赴极边博籴，故边粟常先足，不为诸郡分裂，粮草之价，不能翔踊，诸路税课，亦皆盈衍，此良法也。
Therefore, businessmen are competing to go to the far side to buy food in bulk, so the border food can often be filled up first and will not be occupied by the provinces and prefectures in the inland. As a result, the price of grain and fodder cannot soar, and the tax revenue for each route is also surplus. This is indeed a good way.