Yizhang County is a county in Hunan Province, China, it is under the administration of the prefecture-level city of Chenzhou. Yizhang County covers 2,142.7 km2 (827.3 sq mi). As of 2015, it had a registered population of 644,300 and a resident population of 589,400.

Chenzhou is a prefecture-level city located in the south of Hunan province, China, bordering the provinces of Jiangxi to the east and Guangdong to the south. Its administrative area covers 19,317 square kilometres (7,458 sq mi), 9.2% of the provincial area, and its total population reached 4,581,779 in the 2010 census, 26% of them living in urban areas, 74% of them live in rural areas.