《汉书·传·匈奴传上》
但是匈奴人也很贪婪，还是喜欢边塞的贸易市场，爱好汉朝的货物，汉朝也还开放市场，以投其所好。
然匈奴贪，尚乐关市，嗜汉财物，汉亦通关市不绝以中之。
However, the Xiongnu were greedy too, still loved the trading market on the border, were fond of the goods of the Han, and the Han also opened the market in order to please them.