During the Western Han Dynasty, Gaomi belonged to Jiaoxi Kingdom and Jiaoxi County successively. In the first year of the Western Han Dynasty (73 BC), Jiaoxi County was reorganized into Gaomi State and Gaomi was governed. Today the urban area of ??Gaomi is Yi'an County:

Gaomi in the Eastern Han Dynasty belonged to the Beihai Kingdom, and the urban area today is still called Yi'an County