During his travels in the United States, Liang Qichao, a Guangdong (Canton) native, wrote in 1903 that there existed in the United States a food item called chop suey which was popularly served by Chinese restaurateurs, but which local Chinese people do not eat, because the cooking technique is "really awful".
from humble origins...
btw American Chinese cuisine is now considered a respectable regional genre along with Sichuan, etc
The Chinese Exclusion Act allowed merchants to enter the country, and in 1915, restaurant owners became eligible for merchant visas. This fueled the opening of Chinese restaurants as an immigration vehicle. Pekin Noodle Parlor (in Butte, Montana!), established in 1911, is the oldest operating Chinese restaurant in the country. As of 2015, the United States had 46,700 Chinese restaurants.
Along the way, cooks adapted southern Chinese dishes such as chop suey and developed a style of Chinese food not found in China. Restaurants (along with Chinese laundries) provided an ethnic niche for small businesses at a time when Chinese people were excluded from most jobs in the wage economy by ethnic discrimination or lack of language fluency. By the 1920s, this cuisine, particularly chop suey, became popular among middle-class Americans. However, after World War II it began to be dismissed for not being "authentic".