It's interesting how on the whole (Chinese from China) students are a lot more conscientious with tipping.
Like, you get a few stinkers, but otherwise you see a lot of people trying to "do it right," even after they've just arrived into the country for school and it's clear they don't quote know how the system works.
Like, I've seen a (Chinese from China) customer go to pay the bill and give their credit card and they ask me to put on a 15% tip, since they don't know that they get the receipt back and they write it on that and the amount is then adjusted later to account for the tip -- something very endearing, since they want to do right, but just aren't oriented yet!
Similarly, I see a lot of tips that are **exactly** 15% to the penny -- stuff like $2.43 -- whereas a customer from a tipping culture might round up a little, to make it a flat $2.50 or to make the bill amount plus the tip make a round number in total.
My one (older) (Thai) coworker who's a whiz at the phones was also reminiscing about a (female) (foreign) (East Asian) (presumably Chinese from China) (presumably student) customer who didn't realize the payment system and brought the bill up to the counter to pay rather than leave it on the table, and she had to explain everything to her, including the area for tip, and the customer was like, "Thank you, I don't know, I will take this and ask my American friend," and she took the bill and went back to the table and figured everything out with her friend.
"Someone has taught them," my one (newer) (taller) (Thai) coworker was like, when we were discussing these differences, between the (Chinese from China) and (foreign) (South Asian) (student) customers.