刘晏属下各道的巡院,各自招募能走善跑的人传递信息。全国各地设置的驿站遥遥相望,四方货物价钱高低及其变化,即使距离很远,不几天也能传入刘晏的耳朵。因此,刘晏能够掌握各种货物的价格信息,通过低买高卖,使天下货物价格得以平稳。刘晏改革盐法,暴敛百姓钱财,结果使朝廷用度充裕,盐商大贾们骤然巨富。由于食盐定价过高,卖盐利益巨大,所以平民百姓非法贩卖私盐的活动也日益猖獗,成为唐宋两朝最为突出的社会问题。 Liu Yan patrol under the Road, each recruiting good runners to pass information. Stay across the country set afloat, the price of the Quartet and its changes in the level of goods, even if the distance is very far, a few days can also be introduced Liu Yan’s ears. Therefore, Liu Yan can grasp the price information of a variety of goods, through the low to buy and sell, so that the world goods prices to be stable. Liu Yan reform salt law, surging people money, as a result of the court ample sufficiency, Salt merchants Jiaqu suddenly rich. Due to the over-pricing of salt and the tremendous benefit of selling salt, the illegal smuggling of private salt by civilians became increasingly rampant and became the most prominent social issue in the Tang and Song dynasties.