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.
Yongdeng, known as Lingju and Zhuanglang in ancient times, belongs to Lanzhou City, Gansu Province, located in the central part of Gansu Province, longitude 102 °36'to 103 °45 'east, latitude 36 °12' to 37 °07 'north. It is bordered by Gaolan County and Jingtai County of Gansu Province to the east, Minhe County of Qinghai Province to the west, Honggu District and Xigu District of Lanzhou City to the south, and Tianzhu Tibetan Autonomous County to the north. The longest distance from south to north is 107km, and the widest distance from west to east is 101km, with a total area of 6090 square kilometers. As of 2010, Yongdeng County has jurisdiction over 13 towns and 5 townships. In 2010, the total population at the end of the year was 522000, and the resident population at the end of the year was 419400. In 2018, the county achieved a gross domestic product (GDP) of 10.831 billion yuan. On January 25, 2019, Yongdeng County was selected as 201.