Longchang City, a county-level city under the jurisdiction of Sichuan Province, is located in the southeast of Sichuan Province and the southern end of Neijiang City. It spans between 105°02 '~ 105°26' east longitude and 29°11 '~ 29°32' north latitude. It is 210 kilometers from Chengdu and 138 kilometers from Chongqing. The total area is 794.41 square kilometers; In October 2022, it has jurisdiction over 11 towns and 2 subdistricts. By the end of 2021, it has a registered population of 752,500. The municipal government is located in Guhu Sub-district, which is higher in the northeast and lower in the southwest. It is a subtropical humid monsoon climate with an annual average temperature of 17.7℃. It is the national base for commodity grain, live pigs, fruits and special aquatic products.

Longchang city territory, Tang Dynasty Wude four years (621 years), the territory of Laifeng County, Ming Longqing first year (1567) cut Lu County 2, Rongchang 4, Fushun 14 li county, named Longchang County, meaning "prosperity"; In January 1952, Luxian Special Area was changed into Longchang Special Area; in April 1978, Longchang was divided into Neijiang Area; in June 1985, Longchang was changed into a city, and Longchang was under the jurisdiction of Neijiang City. In April 2017, Longchang County was established with the approval of The State Council. There are many tourist attractions in Longchang, including eight ancient views of Longchang, and "three ancient Tours" of Longchang Ancient Archway, Guyu Lake and Genting Ancient Village.

Longchang City is Sichuan Province tourism demonstration zone, the hometown of Huang Fusheng, the pioneer of the revolution of 1911; It has the reputation of "the Hometown of China's Stone Archway", "China's Qingshi Cultural City" and "South Sichuan Wild Waterfowl Paradise". It is also Neijiang Rongchang modern agricultural high-tech industry Demonstration zone. On September 22, 2020, Longchang City won the 2019 Sichuan Province grain Production "Harvest Cup". In 2021, Longchang was named "the Land of Fish and Rice in Western China".

By the end of 2021, the regional GDP of Longchang was 32.725 billion yuan, an increase of 8.9%. The value added of the primary industry was 4.807 billion yuan, up by 6.8%; The added value of the secondary industry was 10.689 billion yuan, up by 7.0%; The value added of the tertiary industry was 172.29 billion yuan, up by 10.8%.