Introduction to Chinatown: San Francisco Chinatown is about 1 kilometer long and wide, with a total of 16 street intersections. The unique Chinese and English signboards and banners in Chinatown are dazzling. Cantonese is the main language here. At the end of the 19th century, Chinese immigrants came to California to build the Pacific Railway and pan for gold, and made great contributions to local economic construction. However, they were regarded as "second-class citizens" by the government at that time, along with Italian immigrants, blacks, poor whites, and sailors. and requiring them to live in specific areas so as not to "contaminate" other places. They had no choice but to move around in a small area centered on Grant Ave., and later new immigrants moved in. Today, it has become Chinatown, the largest Chinese community outside of Asia. .