Introduce San Francisco.

1, San Francisco is called San Francisco by China people. Located on the west coast of California, the San Francisco Peninsula, with an area of 47 square miles, surrounded by water on three sides and a beautiful environment, is a mountain city.

2, smaller than Hong Kong

San Francisco is also called "San Francisco" and "San Francisco"

4. In the United States, it is an important port city in California and a major seaport for trade between the United States and the Pacific.

It is an important city in America (coastal area).