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遞交白皮書後離開美國，收到通知打指紋的日期在回美國前兩天。可不可以不改期。第回來後直接去打指紋啊。主要是回來美國呆的時間短，怕來不及改期。謝謝！
-It should be fine for just two days later than the schedule day (explain to the IO). If you make a reschedule, you don't know when you will get the new schedule appointment.