 Yin-yang, qi and the Five Agents also informed medical theories, which were systematized in a cosmological framework in the Yellow Emperor’s Classic of Internal Medicine or Huang Di neijing (Veith 1972, Unschuld and Tessenow 2011). This complex and multi-layered text, probably compiled in the first century BCE, presents a systematic cosmology that analogizes the body, the state, and the cosmos in complex systems of “correlative cosmology” (Graham 1986; Sivin 1995; Lloyd and Sivin 2002). For example, the Huang Di neijing describes correspondence between the articulations of the body and the cosmos, specifically between heaven and earth and the upper and lower parts of the body, including relations and analogies between body, state and the cosmos, all expressed in terms of yin-yang and the Five Agents (Huang Di neijing lingshu, 71.2, 446). Such correlations seem a far cry from either cosmological speculation or empirical science in any modern sense. Between those extremes stand the mostly lost arts of technical traditions described in the Han shu Bibliographic Treatise: astronomy, medical, pharmacological, and mantic arts, whose practitioners were the counterparts and potential competitors of the Masters textualists or philosophers (Lloyd and Sivin 2002). Expertise initially developed by diviners and technical specialists became part of the Daode jing, Zhuangzi, and Huainanzi. It was also incorporated into the systematic cosmology and medicine of the Han (Lloyd 1996, Lloyd and Sivin 2002). The Huang Di neijing is listed (and first appears) in the Recipes and Methods section of the Han shu Bibliographic Treatise under the heading of Medical Classics (Han shu 30, 1776).