Chopsticks are small tapered sticks used in pairs of equal length as the traditional eating utensils of China, Japan, Korea, and Vietnam. The pair of sticks is maneuvered in one hand, between the thumb and fingers, and used to pick up pieces of food.
In the Home timeline, use of chopsticks was common among all Americans, regardless of ancestry. Like many of his contemporaries, Paul Gomes was adept in their use from a young age, often going to eat at Asian restaurants.
On the other hand, in the alternate where the German Empire occupied the United States, it was completely unheard of for any but people of Chinese or Japanese ancestry to use chopsticks. When eating with members of the Triads at a Chinese restaurant, Gomes in a rash act of bravado demonstrated his skill in using chopsticks. He immediately regretted it, as it betrayed outsider status and made his shrewd Chinese opponents all the more curious about, and suspicious of, his origins.
Vasili Yasevich had grown up in Harbin and so used chopsticks like a native. This still surprised people when they saw him eat. Mei Ling, the serving girl at the teahouse he frequented, covered her mouth when she giggled to see him eat. She admitted it was strange to see a "round-eye" eat like a regular person. Yasevich replied he was a regular person, in the same northeastern dialect of Mandarin she used, and then used the chopsticks to eat some more noodles.