Linfen is a prefecture-level city in the southwest of Shanxi province, China, bordering Shaanxi province to the west. It is situated along the banks of the Fen River. It has an area of 20,275 square kilometres and according to the 2020 Census, a population of 3,976,481 inhabitants of which 959,198 live in the built-up area made up of Yaodu urban district. The GDP of Linfen ranked second in Shanxi Province. It was known as Pingyang during the Spring and Autumn period.