 The first view is represented by Fu Jia (also pronounced Fu Gu, 209–255), who emerged as a major policy maker during the Wei-Jin transition. On this account, both nature and capacity are determined by one’s qi endowment. Whereas nature is the inner substance, capacity reaches outward in functional ability and conduct. This view finds eloquent support in another third-century work, the “Disquisition on Capacity and Nature” (Caixing lun) by Yuan Zhun, who was on good terms with Ruan Ji. According to Yuan, beings can be either excellent or of a poor quality. Whereas the former are endowed with “pure qi,” the latter are constituted by energies of a more “turbid” composition. It is like a piece of wood, Yuan adds; whether it is crooked or straight is a matter of nature, on the basis of which it has a certain capacity that can be made to serve particular ends.