《新唐书·列传·卷四十五》
他以为设官留兵有三难：设官势必汉人与土著民族杂居，将引起猜忌怨恨；留兵转运粮草，祸患将日益加重；日后突然反叛，劳民费财必然严重。
言置官留兵有三不易：置官必夷汉杂居，猜嫌将起；留兵转粮，为患滋重；后忽反叛，劳费必甚。
He believed that there were three disadvantages in setting up government offices and stationing troops there. Establishing government offices would inevitably lead to the Han people and the ethnic minorities to live together, arousing suspicion and resentment. Stationing troops and transporting food and supplies would increase the suffering. If they suddenly rebelled in the future, those measures would certainly become a drain on the people and the country, and cost a lot of money.