However, the anthropologist E. N. Anderson traces the dish to tsap seui (杂碎, "miscellaneous leftovers"), common in Taishan, Guangdong (Toisan) – the home of many early Chinese immigrants to the United States.

Yu speculates that shrewd Chinese American restaurant owners took advantage of the publicity surrounding his visit to promote Chop Suey as Li's favorite.

"[8][9] In 1888 Wong wrote that a "staple dish for the Chinese gourmand is chow chop svey [sic], a mixture of chickens' livers and gizzards, fungi, bamboo buds, pigs' tripe, and bean sprouts stewed with spices.

[11] An article in The Illustrated American on Chinese cuisine in 1897, reproduces a menu from Ma Hung Low's restaurant on Mott Street in New York's Chinatown quarter which includes the dish "Beef Chop Suey with Bean Sprouts, Water Chestnuts and Boiled Rice."

For example, in the classic novel Journey to the West (circa 1590), Sun Wukong tells a lion-monster in chapter 75: "When I passed through Guangzhou, I bought a pot for cooking za sui – so I'll savor your liver, entrails, and lungs.