《金史·列传·卷二十九》
正隆四年，海陵皇帝调遣诸路军队攻打宋朝，年二十岁以上、五十岁以下的都登记从军。
正隆四年，调诸路兵伐宋，年二十以上、五十以下皆籍之。
In the fourth year of Zhenglong, Emperor Hai Ling mobilized armies from various routes to attack the Song Dynasty, all men over the age of twenty and under the age of fifty were registered for military service.