《金史·列传·卷三十》
大定二十四年，金世宗皇帝前往上京，皇太子守京城，诏令左丞相完颜守道与徒单克宁都留在中都辅助太子。
二十四年，世宗幸上京，皇太子守国，诏左丞相守道与克宁俱留中都辅太子。
In the twenty-fourth year of Dading, Emperor Jin Sezong went to Shangjing, while the Crown Prince stayed in the Capital. By imperial decree, Left Prime Minister Wanyan Shudao and Tudan Kenning remained in Zhongdu to assist the Crown Prince.