Memphis is a city in the U.S. state of Tennessee. It is the seat of Shelby County in the southwest part of the state; it is situated along the Mississippi River. With a population of 633,104 at the 2020 U.S. census, Memphis is the second-most populous city in Tennessee, after Nashville.
Memphis is the fifth-most populous city in the Southeast, the nation's 28th-largest overall, as well as the largest city bordering the Mississippi River. The Memphis metropolitan area includes West Tennessee and the greater Mid-South region, which includes portions of neighboring Arkansas, Mississippi and the Missouri Bootheel. One of the more historic and culturally significant cities of the Southern United States, Memphis has a wide variety of landscapes and distinct neighborhoods.
Zichang City, which is directly under the jurisdiction of Shaanxi Province and managed by Yan'an City, is located in the middle of the Loess Plateau, Hengshan District to the north, Zizhou County and Qingjian County to the east, Yanchuan County and Yanan County to the south, Ansai District and Jingbian County to the west, between longitude 109o1158 "- 110o0120022" east and latitude 36 °593030 "- 37 °300000N, with a total area of 2405 square kilometers. The county seat is 93 kilometers away from Yan'an and 430 kilometers away from the provincial capital Xi'an. In 31 (1942), in memory of the national hero Xie Zichang, he changed his name to Zichang County, the hometown of Xie Zichang, the foothold of the long March of the Central Red Army and the starting place of the Anti-Japanese Eastern Expedition. The late agrarian revolution was the seat of the CPC Central Committee and the Chinese Soviet government, and after the founding of the people's Republic of China.