Fenyi County, which belongs to Xinyu City of Jiangxi Province, is located in the west of the central part of the Yangtze River and the middle reaches of Yuan River. It is adjacent to Yushui District of Xinyu City in the east, Anfu County of Ji 'an City in the south, Yuanzhou District of Yichun City in the west, and Shanggao County of Yichun City in the north. It covers an area of 1,389 square kilometers and has jurisdiction over 7 towns, 3 townships, 2 subdistricts and 1 provincial-level industrial park, 134 administrative villages and 27 communities. By the end of 2020, Fenyi's permanent population was 274,500.

Song Yongxi first year (984 August), points Yi county, Yuan Zhou. In July 1983, Fen was under the administration of Xinyu City. Fenyi County is located in the middle of Nanchang City and Changsha City, with Hangnan-Changsha high-speed railway, Shanghai-Kunming high-speed railway, Zhejiang-Jiangxi Railway running from east to west, Buji high-speed and Menghua Railway running from north to south. It is 40 minutes' drive from Mingyueshan Airport in Yichun. In 2020, Fen Yi County achieved a gross regional product of 18.812 billion yuan, a year-on-year growth of 5 percent. The total revenue was 2.574 billion yuan, up 3.1% year on year.