Si Mian Shan Town, belonging to Chongqing Jiangjin District, is located in the southern part of Jiangjin District, east of Berlin Town, Guizhou Province, Xi Shui County Zhaiba Town, south of Xi Shui County, Guizhou Province, Xi Shui County, Dapo Township, Three Forks of the River Township as a neighbor, the west of Sichuan Province, Hejiang County, Sichuan Province, Zihuai Town, north of the town of connection with the Zhongshan, from the People's Government of Jiangjin District Residence of 70 kilometers, the area covers a total area of 255.2 square kilometers. At the beginning of the Qing Dynasty, the territory of Si Mian Shan Town belonged to the twelve capitals of Jiangjin County; in June 1988, Toudaohe Township was reorganized into Si Mian Shan Town. As of the end of 2018, the household population of Si Mian Shan Town was 15,019. As of June 2020, Si Mian Shan Town has one community and six administrative villages under its jurisdiction, with the town people's government stationed at No. 27 Wenfeng Road in Longtan Lake Community. In 2018, there were 12 industrial enterprises in Si Mian Shan Town, and 5 general stores or supermarkets with a business area of more than 50 square meters.