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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.

Chengcheng County, which belongs to Weinan City, Shaanxi Province, is located in the eastern part of Guanzhong Basin, Shaanxi Province. It is between 109o 46km east longitude-110o 05km east latitude and 34o 550045 "- 35o 2705km north latitude, with a total area of 1121 square km. Chengcheng County has a long history. It was built from the Northern Wei Dynasty, and the county name has been in use for 1540 years. The terrain is high in the north and low in the south, and the county is divided into "three beams and one original" by four rivers. It is a warm temperate semi-humid monsoon zone with an average annual temperature of 12 ℃, precipitation of 680mm, frost-free period of 204days and a large temperature difference between day and night. As of 2018, Chengcheng County has jurisdiction over 1 street and 9 towns. By the end of 2017, Chengcheng County had a resident population of 393224, with a gross domestic product (GDP) of 8.569 billion yuan.
Travel Guides In Chengcheng County
Travel Notes In Chengcheng County