Chéngzhōu

Chengzhou corresponds to Cheng County among the mountains of southeastern Gansu, within the Longnan region. The area covers about 1,780 square kilometers, and its county seat lies at Chengguan. Mountains enclose the district, yet their valleys have a temperate climate suited to agriculture; this combination of difficult terrain and sheltered cultivated ground shaped settlement and movement. The surrounding uplands also contain lead and zinc, adding mineral resources to the rural economy. Walnut growing is a long-established local product. For the historical district, this suggests that households drew on both valley fields and the resources of wooded slopes rather than relying on one crop alone. Roads had to follow the grain of the mountains, linking settlements through Longnan and toward Tianshui. Chengzhou’s identity is therefore closely tied to the practical geography of southeastern Gansu: sheltered farmland, mineral-bearing ridges and routes threading between them. Walnuts, minerals and valley crops illustrate how communities diversified their use of a compact mountain county throughout different seasons. Seasonal work joined the fields, slopes and mountain roads into one rural system.