  Philosophers deployed these ideas in (1) the yin-yang cosmology of the Yi jing, (2) theories of correlative correspondence between Heaven, Earth and Humanity as a shared representation of cosmic order, and (3) the idea of a “classic” or “canon” as the founding text of a textual lineage. Practitioners of several sciences also deployed these concepts, in particular in models of the human body and of the movements of the sun, moon and stars.