Administratively, it refers to Hengyang, Chenzhou and Yongzhou, a total of 34 counties (cities, districts) with a total land area of 57 153 square kilometers; Geographically speaking, it refers to Hengyang City, Yongzhou City, Chenzhou City, Shaoyang City, Youxian County, Chaling County, Yanling County and Shuangfeng County, all of which belong to Hengyong Chen Gui Road, Hengyang Road and Xiangnan Administrative Region in history.
Geographically speaking, southern Hunan is a typical cascade transition zone, adjacent to Guangdong, Guangxi, Jiangxi and Guizhou provinces. In 20 10, the total population of southern Hunan was19.97 million, and the regional GDP was 526.9 billion yuan, accounting for 29% and 27% of Hunan Province respectively.