Thanks for your msg. The University of Illinois at Urbana-Champaign's program director told me that
"You are on our waiting list. Unfortunately, I would have to say your chances of eventual admission are not good. We had a very large number of students apply in IR this year. You have a strong record, but there are seven students ahead of you on the wait list."
I suppose that there is UIUC is not the top 5, but it is also a good program. I really hope that those who were admitted to UIUC but had a better choice can reject the offers, otherwise I really don't know where to go