New york: new york City is located on the Atlantic coast of southeastern New York. It is the largest city and port in the United States and the largest city in the world. It is also called "Newland Port" with London in Britain and Hongkong in China.
Los Angeles: Los Angeles, located in the southwest of California, is the second largest city in the United States and the largest city in the western United States. It is usually called city of angels.
Chicago: Chicago is the third largest city in the United States, the largest city in the north of the United States, a world-famous financial center, the largest commercial center and one of the largest futures markets in the United States, and one of the most important cultural, scientific and educational centers in the United States.
Houston: Houston is called "Space City" and is the fourth largest city in the United States. It is famous for its energy (especially oil), aviation industry and canals. Houston Port is the sixth largest port in the world and the busiest port in the United States. The headquarters of Fortune 500 is second only to new york. Houston is the seat of Texas Medical Center and the largest and most important research and treatment institution in the world.
Philadelphia: Philadelphia is one of the oldest and most historic cities in the United States. 1790- 1800 Washington was the capital of the United States before the founding of the People's Republic of China, so it played a very important role in American history.