Xin sure nailed that one! You can go to the most out of the way little towns in America which won't support a McDonald's or a DQ and you'll still likely find a restaurant run by a Chinese-American family.
It has been that way almost since the 1880s when the railroad was built. Read the history on out-of-the-way former railhead towns like Milford, Utah and Benton, Wyoming and you will find Chinese restaurants and businesses were as much a part of the Wild West landscape as saloons, cowboys, outlaws and U.S. Marshals.
It is almost surprising that Europeans and not the Chinese "discovered" America due to an early 1400s quirk in Chinese history which caused the ruling dynasty to downsize what was then the biggest fleet and trading empire in the world.