• Oakland
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Oakland is the largest city and the county seat of Alameda County, California, United States. A major West Coast port, Oakland is the largest city in the East Bay region of the San Francisco Bay Area, the third largest city overall in the Bay Area and the eighth most populated city in California. With a population of 440,646 in 2020, it serves as the Bay Area's trade center and economic engine: the Port of Oakland is the busiest port in Northern California, and the fifth busiest in the United States of America. An act to incorporate the city was passed on May 4, 1852, and incorporation was later approved on March 25, 1854. Oakland is a charter city.

Oakland's territory covers what was once a mosaic of California coastal terrace prairie, oak woodland, and north coastal scrub. In the late 18th century, it became part of a large rancho grant in the colony of New Spain. Its land served as a resource when its hillside oak and redwood timber were logged to build San Francisco. The fertile flatland soils helped it become a prolific agricultural region. In the late 1860s, Oakland was selected as the western terminal of the Transcontinental Railroad. Following the 1906 San Francisco earthquake, many San Francisco citizens moved to Oakland, enlarging the population, increasing its housing stock, and improving its infrastructure. It continued to grow in the 20th century with its busy port, shipyards, and a thriving automobile manufacturing industry.

Zhenglan Banner is a flag belonging to Xilingol League of Inner Mongolia Autonomous region. it is located in the south of Inner Mongolia Autonomous region and the southern end of Xilingol League in Paradise grassland. It is only 180 kilometers away from the capital Beijing. It is the nearest typical grassland area to Beijing. Longitude 116.02 °east, latitude 42.25 °north. Zhenglan Banner has a total area of 10182 square kilometers, a total population of 83000 and a peak population of 105000. It is a multi-ethnic area dominated by Mongolians. It is Hunshandake sandy land in the north, showing the natural scenery of sandy grassland, and low mountains and hills in the south, showing the beauty of meadow steppe. Zhenglan Banner is rich in water resources, including 21 rivers and 147 lakes. The banner is rich in wild animal and plant resources. There are 708 species of plants and rare fields in the banner.
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