Yilong County, under the jurisdiction of Nanchong City, Sichuan Province, is located in the northeast of Nanchong City, Sichuan Province, with a total area of 1788 square kilometers. As of October 2021, Yilong County has jurisdiction over 1 subdistrict, 29 towns and 7 townships. In 2021, Yilong County has a registered population of 1,054,900 and a permanent resident population of 721,000.

Yilong County, Nanchaobi County, 244 National road, 245 national road, 205 provincial road, 206 provincial road, 207 provincial road, 304 provincial road, Chengba highway and Yinchuan - Kunming highway through Yilong County. Yilong County is a complex terrain with hills and valleys, mild climate, four distinct seasons, abundant heat, abundant rainfall, rain and heat in the same season. It is one of the first batch of revolutionary cultural relics protection and utilization plots to distinguish counties, national garden county, and national ecological civilization construction demonstration county. Farming county based on the planting industry, is the first county of the national rabbit industry, the province's modern animal husbandry key county, the province's high standard grain field construction key county, the national agricultural technology promotion demonstration county, the national soil formula fertilization demonstration county, rich wheat, rape, rice, red vicia, citrus and so on. Yilong is the old Sichuan Shaanxi revolutionary base, "(Zhu De) Marshal out of Yilong, banners full of thousands." During the Second Civil Revolutionary War, more than 7,000 Yilong sons and daughters represented by Zhang Side followed the Long March of the Fourth Front Army of the Chinese Workers and Peasants Red Army, of which more than 5,000 sacrificed their precious lives for the liberation of the Chinese people. On July 31, 2018, the Sichuan provincial government approved Yilong County to be removed from the poverty-stricken county list.

In 2021, the GDP of Yilong County was 25.76 billion yuan, an increase of 5.6% over the previous year. The value added of the primary industry was 6.67 billion yuan, and that of the secondary industry was 9.02 billion yuan; The added value of the tertiary industry was 10.07 billion yuan, and the tertiary industry structure was 25.9:35.0:39.1.