The general situation is located in the west of Henan Province, bordering Shanxi and Qin Provinces, bordering Luoyang City in the east, Shaanxi Province in the west, Shanxi Province across the Yellow River in the north, and Funiu City in the south and Nanyang City in the south.With an area of 10496 square kilometers and a population of 2.13 million, it has jurisdiction over one district, two cities and three counties, 76 townships (towns) and 1347 administrative villages.The Xia and Shang dynasties belonged to Yuzhou, the Western Zhou Dynasty was enfeoffed with Jiao and Guo, the Spring and Autumn Period belonged to Guo first, then to Jin, the Warring States Period belonged to Sanchuan Prefecture of Qin, the Western Han Dynasty belonged to Henan Prefecture and Hongnong Prefecture, the Three Kingdoms belonged to Wei, the Northern Wei Dynasty to Shaanxi, and the Song, Yuan, Ming and Qing Dynasties to attack.During the period of the Republic of China, it successively belonged to West Henan Road, Heluo Road, the third and eleventh administrative regions of Henan.In March 1949, it belonged to Shanzhou District, and in April 1952, it belonged to Luoyang District.Sanmenxia City (prefecture level) was established in March 1957 and reduced to county level in October 1961