111 years ago today, on February 16, 1914 (January 22, 1914, the world's first air route was opened. On February 16, 1914, the world's first air route was opened. A flight route from Los Angeles to San Francisco in the United States is opened. Los Angeles is located in the city of southern California on the west coast of the United States. It is the second largest city in the United States, second only to New York. An international metropolis with great influence. Los Angeles is one of the world's cultural, scientific, technological, international trade and higher education centers, and also has world-renowned institutions in various professional and cultural fields. The city and its adjacent areas form the foundation of Los Angeles's international reputation and global status in terms of mass entertainments-such as movies, television, and music. The world-famous Hollywood is located in the city. Los Angeles has become the largest base for the petrochemical, marine, aerospace industries and electronics industries in the United States. It is one of the major centers of science and technology in the United States. It has the largest seaport in the United States. It ranks first in the world for scientists and engineers. Los Angeles has become the financial center in the United States. San Francisco, also known as "San Francisco" and "San Francisco". Pacific Coast port, major industrial and commercial city, California, USA. Located at the northern end of the peninsula between the Pacific Ocean and the Bay of San Francisco, latitude and longitude: 37°48 '0 "N, 122°25' 0" W; time zone: GMT-8. The urban area is 116 square kilometers. The population was 713,000 (1984), and the metropolitan area (including Oakland, Berkeley, etc.) was 3.253 million (1980). It was built by the Spanish in 1776, returned to Mexico in 1821, and belonged to the United States in 1848. In the mid-19th century, it developed rapidly amid the craze for gold mining. Overseas Chinese called it "Jinshan", and later it was renamed "San Francisco" in Melbourne, which was different from Australia.