Chicago is located in the midwest of the United States, belonging to Illinois, with Lake Michigan in the east. It is the third largest city in the United States after new york and LA. Located in the center of the North American continent, Chicago is the most important railway and aviation hub in the United States. Chicago is also one of the most important financial, cultural, manufacturing, futures and commodity trading centers in the United States. Gradually become one of the most influential metropolises in the world. Common nicknames of Chicago are "Second City", "Windy City" and "Chicago City". Chicago is also the most important financial center in the world, the second largest commercial center in the United States and the largest futures market in the United States. It is also rated as the most balanced economy in the United States. In addition, the number of new enterprises in the Chicago metropolitan area has always ranked first in the United States. This is an international metropolis.