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  • Daye 

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.

Daye, a county-level city under the jurisdiction of Hubei Province, administered by Huangshi City, is located in the southeast of Hubei Province, the south bank of the middle and lower reaches of the Yangtze River, the hinterland of Hubei "Metallurgical Corridor", an important part of Wuhan city circle, with a total area of 1566.3 square kilometers. Daye is the birthplace of Chinese bronze culture. More than 3000 years ago, Chinese ancestors mined and smelted copper in Daye, creating a bronze civilization. The Tonglushan ancient copper mine site in the territory is known as "the ninth wonder of the world". It has been listed in the National Archaeological site Park project and the preliminary list of "World Cultural Heritage", and has been awarded the Guinness record of "Ancient Copper Mine with the longest continuous Mining time". Tonglushan Sifangtang site was selected as one of the Top Ten Archaeological discoveries in China in 2015. As of
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