Southwest Shanxi, that is, southwest Shanxi Province, is also referred to as "Jinnan Special Zone" because of the establishment of "Jinnan Special Zone" in New China. Han Xin Ridge connects Jinzhong and Lvliang in the north; Taiyue Mountain and Zhongtiao Mountain are adjacent to Changzhi and Jincheng in the east; The west and south are separated by the Yellow River, facing Qin Yu. The geographical scope of southwest Shanxi includes Linfen, Yuncheng and shilou county in Lvliang. Changzhi, Linfen, Jincheng and Yuncheng are all located in the south of Shanxi Province, so they belong to the south of Shanxi in a broad sense. In a narrow sense, Jinnan refers to the "Jinnan area" as mentioned by Shanxi folks, that is, the southwest of Shanxi where Linfen, Yuncheng and Luliang shilou county are located.