 Jia Yi (200–168 BCE) was a Han official who served as tutor to a number of vassal kings associated with the Han—first to the ruler of the distant southern region of Changsha, and later to the ruler of the region of Liang (more on this system of government below in discussion of the Huainanzi). His political thought is presented in the text Xinshu (“New Writings”). Despite debates as to whether the Xinshu was written by Jia or later authors in his name, we can take it as representative of an important strain of Han political thought (Sanft 2005: 6).