8 master,
An additional question. Is the ceremony will be held right after my N-400 interview passed? If not, usually how much time is in between. Because I am scheduling to visit China before my GC will be taken back.
-Sometimes in some case, the oath ceremony may take place at the same day when the interview is complete, but in most cases, the oath ceremony may take place a few days, a few weeks or few months later, (case by case). If you do not want to take the oath yet, you may ask the IO to re-sechedule it.