宋太祖赵匡胤一上台,百废待兴,南边他打理得不错,天下太平,人民安居乐业;北边就不行了,契丹人成了宋朝最大威胁,战火不时燃起,搞得他很头疼。可能是他觉得打仗成本太高,不想以牙还牙、以武制武,想用个经济的办法来解决。他异想天开地算了个账,按当时行情,用二十四匹绢就可以购买一颗契丹人头,而契丹不过十万精兵,这样,总共用不过二百多万匹绢,契丹就没人打仗了。为此,他专门成立一个国家储备库,叫封桩库,用来储备这批专用物资。他还很天真地打算,当库存的钱“满五百缗,当向契丹赎燕蓟”。当然,他这是很幼稚 Song Taizu Zhao Kuangyin a came to power, hundreds of waste to be benevolent, he handled well in the south, the world peace, people live and work in peace; the north will die, Khitan people became the greatest threat to the Song Dynasty, flames of war from time to time ignited, made him a headache. May be that he felt the cost of war is too high, do not want to toothless, armed forces armed with weapons, want to use an economical solution. He imagined a whimsical account, according to the market at that time, with twenty-four silk can buy a Khitan human head, but Khitan hundreds of thousands of soldiers, so that with a total of more than two million silk, Khitan no one to fight It's To this end, he set up a special national reserve bank, called the seal pile warehouse, used to reserve these supplies. He is still very naive to plan, when the stock of money “over five hundred 缗, when to Khitan redeemed Yan thistle ”. Of course, he is very childish