Zhao Yanshou
According to the "Zizhi Tongjian", when Emperor Taizong changed Khitan's name to Liao in 937 (although in various sources, there are substantial disagreements as to when this name change occurred), he adopted much of the Chinese governmental structure, and he commissioned Zhao Yanshou as his chief of staff. He also shortly after commissioned him as a chancellor—with the Liao-unique title of "Zhengshi Ling" ().