《汉书·传·杜周传》
霍光纳其言，举贤良，议论废除专卖酒、盐铁，皆从延年发起。
光纳其言，举贤良，议罢酒榷、盐、铁，皆自延年发之。
Huo Guang accepted his advice, selected virtuous officials, and discussed the abolition of monopolies on wine, salt, and iron. These measures were all initiated by Yannian.