《元史·列传·卷六十》
公楠到朝廷详细报告桑哥弊政所造成的危害，请示进行彻底的改变以巩固国家基础，世祖对他的建议很满意。
公楠赴阙，极陈其故，请更张以固国本。世祖悦。
Gong Nan went to the imperial court to give a detailed report on the damage caused by Sangge's maladministration, and asked for instructions to carry out a thorough change to consolidate the foundation of the state. Emperor Shizu was very satisfied with his suggestion.