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^Xin Tangshuvol. 217a "回紇,其先匈奴也,俗多乘高輪車,元魏時亦號高車部,或曰敕勒,訛為鐵勒。" tr: "Uyghurs, their predecessors were the Xiongnu. Because, customarily, they ride high-wheeled carts. In Yuan Wei time, they were also called Gaoju (i.e. High-Cart) tribe. Or called Chile, or mistakenly as Tiele."
^WeishuVol 103 Gaoju "高車,蓋古赤狄之餘種也,[...] 諸夏以為高車丁零。" tr. "Gaoju, probably the remnant stock of the ancient Red Di. [...] The various Xia (i.e. Chinese) considered them Gaoju Dingling (i.e. Dingling with High Cart)"
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