Yongchang County is a county located in the southern half of the prefecture-level city of Jinchang in north-central Gansu province, China, bordering Qinghai to the south. It has been associated with the historical Liqian and Fanhe counties. The village of Zhelaizhai, located in Jiaojiazhuang township, has been the subject of international academic and media attention for its potential connection to Sino-Roman relations.

Jinchang is a prefecture-level city in the centre of Gansu province, People's Republic of China, bordering Inner Mongolia to the north. As of the 2020 Chinese census, its population was 438,026 inhabitants, of which 260,385 lived in the built-up area made up of the Jinchuan District.