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Baltimore (/ˈbɔːltɪmɔːr/ BAWL-tim-or, locally: /bɔːldəˈmɔːr/ bawl-da-MOR or /ˈbɔːlmər/ BAWL-mər) is the most populous city in the U.S. state of Maryland, fourth most populous city in the Mid-Atlantic, and the 30th most populous city in the United States with a population of 585,708 in 2020. Baltimore was designated an independent city by the Constitution of Maryland[a] in 1851, and today is the most populous independent city in the United States. As of 2021, the population of the Baltimore metropolitan area was estimated to be 2,838,327, making it the 20th largest metropolitan area in the country. Baltimore is located about 40 miles (64 km) north northeast of Washington, D.C., making it a principal city in the Washington–Baltimore combined statistical area (CSA), the third-largest CSA in the nation, with a 2021 estimated population of 9,946,526.

Prior to European colonization, the Baltimore region was used as hunting grounds by the Susquehannock Native Americans, who were primarily settled further northwest than where the city was later built. Colonists from the Province of Maryland established the Port of Baltimore in 1706 to support the tobacco trade with Europe, and established the Town of Baltimore in 1729. The first printing press and newspapers were introduced to Baltimore by Nicholas Hasselbach and William Goddard respectively, in the mid-18th century.

The Battle of Baltimore was a pivotal engagement during the War of 1812, culminating in the failed British bombardment of Fort McHenry, during which Francis Scott Key wrote a poem that would become "The Star-Spangled Banner", which was eventually designated as the American national anthem in 1931. During the Pratt Street Riot of 1861, the city was the site of some of the earliest violence associated with the American Civil War.

Zhen'an County is one of the buildings under the jurisdiction of Shangluo City, Shaanxi Province. Located in southeastern Shaanxi Province, the southern foot of Qinling Mountains, southwest of Shangluo City, Han River tributaries Qianyou River and the middle reaches of Xunhe River, 175.5 kilometers from east to west, 72.5 kilometers wide from north to south, with a total area of 3477 square kilometers. The terrain is high in the northwest, low in the southeast, with many mountains and ditches and little arable land. It is an earth-rocky mountain area with "nine mountains and half water and half divided fields". Zhenan County is a national science popularization experimental county, a national medical reform pilot county, a garden city in Shaanxi Province, and a sanitary county in Shaanxi Province. Zhenan chestnut is famous for its large color, sweet and delicious, full grains, rich nutrition and unique quality, and is known as "the hometown of Chinese chestnut". Since ancient times, Xi'an is the main road to Ankang, is the natural link between Shaanxi and Hubei, known as "Qin Chu throat". 2019
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