《新唐书·本纪·卷九·懿宗 僖宗》
五月，泰宁军节度使李系任湖南观察使，并南面行营招讨副都统。
五月，泰宁军节度使李系为湖南观察使，副之。
May, Li Xi, military governor of Taining, was appointed as the inspector of Hunan and deputy commander of the campaign on the southern front.