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  • Gao County

Washington, D.C., formally the District of Columbia, also known as Washington or D.C. or locally simply as the District, is the capital city and federal district of the United States. It is located on the east bank of the Potomac River, which forms its southwestern and southern border with the U.S. state of Virginia, and it shares a land border with the U.S. state of Maryland on its other sides. The city was named for George Washington, a Founding Father and the first president of the United States, and the federal district is named after Columbia, the female personification of the nation. As the seat of the U.S. federal government and several international organizations, the city is an important world political capital. It is one of the most visited cities in the U.S., with over 20 million annual visitors as of 2016.

The U.S. Constitution provides for a federal district under the exclusive jurisdiction of Congress; the district is not a part of any U.S. state (nor is it one itself). The signing of the Residence Act on July 16, 1790, approved the creation of the capital district located along the Potomac River near the country's East Coast. The City of Washington was founded in 1791, and Congress held its first session there in 1800. In 1801, the territory, formerly part of Maryland and Virginia (including the settlements of Georgetown and Alexandria), officially became recognized as the federal district. In 1846, Congress returned the land originally ceded by Virginia, including the city of Alexandria; in 1871, it created a single municipal government for the remaining portion of the district. There have been efforts to make the city into a state since the 1880s, a movement that has gained momentum in recent years, and a statehood bill passed the House of Representatives in 2021.

Gao County, which belongs to Yibin City, Sichuan Province, is located on the southern edge of Sichuan Basin, Gongxian County and Changning County to the east, Xuzhou District to the west, Yunlian County to the south, Cuiping District of Yibin City to the north, Nanxi District to the northeast and Yanjin County, Yunnan Province to the northeast and southwest, between longitude 104 °21 and latitude 28 °11 to 28 °47', the county is 61 km long from north to south and 32 km wide from east to west, with a total area of 1323 square kilometers. The mountains, hills and trough dams in Gaoxian County account for 43.88% respectively. 43.72%, 12.4%. There are 31 large and small rivers, belonging to the Jinsha River and the Yangtze River system, of which Nanguang River is the largest river in the county. It belongs to the humid monsoon climate in the middle subtropics, with an annual average temperature of 18.1 ℃ and a precipitation of 1021 mm.
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