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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.

Danzhou City is a prefecture-level city in Hainan Province. Danzhou City is located in the northwest of Hainan, bordering on the Beibu Gulf, 130km north to Haikou, the provincial capital, and 280km south to Sanya City; it has jurisdiction over 16 towns, a total of 275village committees and 1431 natural villages; the land area is 3400 square kilometers, accounting for 1x10 of the province; the total registered population is 945400 (2016); and the coastline is 267km long. Danzhou City is the economic, transportation, communication and cultural center of western Hainan. Hainan Yangpu Economic Development Zone, Chinese Academy of Tropical Agricultural Sciences and Danzhou Campus of Hainan University (formerly South China Tropical Agricultural University) are all in its territory. Danzhou City has successively won the "National Agricultural Top 100 City", "National Sanitary City", "National Civilization demonstration City", "National Garden City" and "National Garden City".
Travel Sights In Danzhou
Travel Notes In Danzhou
Travel Asks In Danzhou
Travel Asks In Danzhou