《资治通鉴·汉纪·汉纪三十五》
所以，自从光武帝刘秀以来，西域各国思念汉朝的威望高德，全都乐意归降，多次派出使节，把王子送到汉朝充当人质，请求设置都护。
故自建武以来，西域思汉威德，咸乐内属，数遣使置质于汉，愿请都护。
Therefore, since Emperor Guangwu of Han, Liu Xiu, the countries of the Western Regions have missed the prestige and virtue of the Han dynasty, and they have all been willing to surrender. They have sent envoys many times to send the princes to the Han dynasty as hostages, requesting the establishment of a protectorate.