Bronze ruler. Han dynasty, 206 BCE to CE 220. Excavated in Zichang County.
Zichang County is a county in the north-east of Yan'an, Shaanxi, China. It had an estimated population of 240,000 people, an area of 2,405 km2, and 100 people per km2 in 2004. Formerly called Anding County (Chinese: 安定县), it was renamed in 1942 to commemorate the Communist martyr Xie Zichang. It has a population of 273,000, of which 115,000 live in the county seat.