Langxi County, located in Xuancheng City, Anhui Province, was called Jianping in ancient times. It was founded in the first year of Duangong of the Northern Song Dynasty (988). Located in the southeast border of Anhui Province, Anhui, Jiangsu, Zhejiang three provinces junction, known as the "three provinces thoroughfare", the location is superior. The county covers an area of 1,105 square kilometers, with jurisdiction over 3 subdistricts, 9 towns and 1 provincial development zone. By the end of 2021, Langxi County has a registered population of 345,837.

Langxi County has a mild climate, significant monsoon, four distinct seasons, subtropical monsoon Marine climate; With fertile soil and rich products, it is known as the "Hometown of fish and rice" and the "Natural Botanical Garden". It is an important producing area of grain, oil and silkworm cocoons in Anhui Province and a national commodity grain base county. The main products are green tea, yellow rice wine, golden jujube, dull sauce, goose, whitebait, shrimp, crab, turtle and so on; The main minerals are fluorite, yellow sand, limestone, granite, kaolin, phyllite and so on, fluorite reserves of 2 million tons. Langxi County has Stone Foshan, Longshu Lake, Gaojing Temple Forest Park and other tourist attractions.

In 2021, the gross regional product of Langxi County reached 20.85 billion yuan, with a year-on-year growth of 11.1%.