Langfang is a prefecture-level city of Hebei Province, and was known as Tianjin Prefecture until 1973. It was renamed Langfang Prefecture after Tianjin became a municipality and finally upgraded into a prefecture-level city in 1988. Langfang is located approximately midway between Beijing and Tianjin. At the 2020 census, the population of Langfang was 5,464,087, of whom 1,147,591 lived in the built-up area made of Guangyang and Anci districts; its total area is around 6,417.28 km2.