huíhú
Uighurs[仁-二+烏]彝; [仁-二+烏]胡; 高車; 高昌. A branch of the Turks first heard of in the seventh century in the Orkhon district where they remained until A. D. 840, when they were defeated and driven out by the Kirghiz; one group went to Kansu, where they remained until about 1020; another group founded a kingdom in the Turfan country which survived until Mongol times. They had an alphabet which was copied from the Soghdian. Chingis Khan adopted it for writing Mongolian. A. D. 1294 the whole Buddhist canon was translated into Uighur.
Huihu
一回鶻 （Uigur）又作回紇。土耳其系種族，分佈於蒙古、甘肅、新疆之間。其全盛時期為八至九世紀，以外蒙古之鄂爾坤（Orkhon）河畔為據點，而進入中亞。該族最初為鐵勒之一部，在突厥統治之下，至隋代時獨立，後隸屬於唐。其後該族分裂為二：一為猖獗於宋、遼、金時代之甘州回鶻與沙洲回鶻，另一為西州回鶻（居東土耳其斯坦，即高昌之地），虔信摩尼教與佛教。 西元八世紀頃，西州回鶻使用起源於粟特（Sogd）文字之回鶻文字，且以此文字書寫佛典，現存經典有金光明經、法華經普門品、彌勒下生經、尊勝陀羅尼經、天地八陽神咒經等，由上述經典之跋文可知，彼等多重譯自藏文、吐蕃文、漢文等。〔宋史列傳第二四九〕p2903