Yongxin County, which belongs to Ji 'an City of Jiangxi Province, is located in the west of Jiangxi Province, in the middle of the Luoxiao Mountains, adjacent to Xiangdong, Jinggangshan City in the south, Chaling County of Hunan Province in the west, Lianhua County of Pingxiang City in the northwest, Anfu County in the north, Ji 'an County in the east and Taihe County in the southeast. The county covers an area of 2195 square kilometers and has jurisdiction over 1 subdistrict, 10 towns and 13 townships. By the end of 2021, Yongxin County has a registered population of 523,600.

Yongxin County was called Wu Tou in ancient times. It was built in the 9th year of Jian 'an in the Eastern Han Dynasty (204). The name of Yongxin county comes from the Book of University · Rites, which means "the sun is eternal and the moon is new". Yongxin is a famous "general County", a county in the Central Soviet Area, an important part of the Jinggangshan revolutionary base, the center of the Hunan-Gan revolutionary base, the station of the Hunan-Gan Provincial Party Committee of the Hunan-Gan revolutionary base, and the location of the Sanwan reshuffling and the Longyuankou battle. Within the territory, there are more than 400 red landscapes, such as the former site of Hunan and Jiangxi Provincial Party Committee organs, the former site of Sanwan Reorganization, and more than 10,000 pieces of revolutionary cultural relics. Yongxin County ranked first in Ji 'an and fourth in Jiangxi Province in terms of the total number of intangible cultural heritage.
In 2021, the GDP of Yongxin County reached 13.4 billion yuan, an increase of 9.6%; The total revenue reached 1.546 billion yuan, an increase of 20.9%.