Abstract: The success of the Qing rule was largely reflected in its solution to frontier issues. Frontier issues has been extensively discussed by current academic, especially by the so-called New Qing Historians, but the New Qing History focuses mainly on Manchuria, Mongolia, and Tibet, as well as the relations between the Manchu rulers and the above-mentioned peoples, while paying less attention to Hui Territories and its inhabitants, Huiren (today’s Uyghurs). Based on criminal cases--mainly murders--involving Huiren recorded in Manchu and Chinese materials, this paper discusses the application of local law and Hui regulations, in judicial trials, and the Qing effort to adjust and narrow the scope of its application. The effort to narrow the role of Hui regulations in such cases eventually led to the Qing code replacing Hui regulations. The author further argues that the Muslim rebellions and the increasingly widening cultural gap between Muslims and the ruling class, as well as non-Muslims, resulted in the transition of the Qing ruling ideology and policies in Huijiang.