Yi County or Yixian is a county in the southeast of Anhui Province, China, under the jurisdiction of Huangshan City. It has a population of 100,000 and an area of 847 square kilometres (327 sq mi). The government of Yi County is located in Biyang Town. The villages of Xidi and Hongcun in Yi County are part of the World Heritage Sites.

Huangshan, is a prefecture-level city in southern Anhui Province, People's Republic of China. Huangshan means Yellow Mountain in Chinese and the city is named after the famously scenic Yellow Mountains which cover much of the city's vast geographic expanse. The prefectural city of Huangshan includes three urban districts and four counties. The urban center of Huangshan was originally the city of Tunxi and is now called Tunxi District. Locals still call the city Tunxi to distinguish the urban core from other parts of Huangshan. The population of Huangshan City As of the end of 2021, the resident population of Huangshan City was 1.332 million, with an urbanization rate of 59.25%, an increase of 0.96 percentage points over the previous year. By the end of 2021, the household population of Huangshan City will be 1,485,700, with an urbanization rate of 37.82%, an increase of 1.66 percentage points.