In 1782 acting Shaanxi Governor Bi Yuan 畢沅 (1730–97) submitted an exemplary memorial to the throne that concisely outlined the provincial administrative view of the proper order of relations between people, cultivars, livestock, climate, and water in northwestern China. He began with ostensibly human relations. His premise was that imperial official identity was ultimately formed through its connection to the food security of the general populace: “The root purpose of appointing officials is to prioritize the devotion of effort to civil affairs, and its main end is to put food sufficiency first.” Bi Yuan, like most of his contemporaries, unquestionably valued agriculture as the general and “main source” of food. By virtue of his posting to a China-proper province whose northern reaches lay along an ecotone with the Mongolian steppe, however, Bi Yuan was also distinctively aware of pastoralism as what he called the “second” source. While he made it clear that agriculture was certainly preferable, he was equally plain that human agency's range of choice was quite constrained in large parts of his jurisdiction, primarily by scarce water and cold climate. “Places in the northern provincial prefectures of Yan'an 延安 and Yulin 榆林, like Suide 綏德 and Fuzhou 鄜州, have land full of sand and gravel. Each is a high, cold frontier area where rainfall and ponds are scarce and inhibited, so that at harvest there is concern about shortfall.”