I was reading Nicolae Jorga's "History of Ottoman Empire vol. 1" and he gave information that Mete Khan, who freed Hsiung-nu people from the rule of Yue-chi, was a servant of the Chinese Emperor. But at the bottom of the page there is an editorial note saying, "During the time of Mete Khan, Huns were not serving China".
Common sense dictates that Mete Khan is, of course he wasn't serving China but from where did Jorga have the idea?