Xue Rengui
Although he lost early wars against Xue Rengui, he was formidable force in establishing Turkic Khaganate. In 687, another invasion of Tang by Elteriš and Ashide Yuanzhen began. Empress Dowager Wu commissioned the ethnically Baekje general Heichi Changzhi, assisted by Li Duozuo, to defend against Turkic attack and they were able to defeat Turk forces at Huanghuadui (modern day Shuozhou, Shanxi) causing Turk forces to flee.