Does she ever eat in the snackbars or cafeterias? Does she ever use the restrooms in other parts of the campus?
Do any of her classmates also take courses or use facilities Chinese students would take or use?
Did you really think things through before posting that or are you just trying to deceive yourself?
First, classes only started Tuesday, so she hasn’t had much interaction. Second, she has classes 4 days a week and two of them are off campus.