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I have stayed in US for years and came back to China last month for visit.
I got US visa yesterday in Beijing.
But my I-20 was sealed in an envelope by the embassy staff. I was told that
the envelope cannot be open by immigration officers until I enter US border .
I am a little bit afraid of this.
Could this be a problem for me?
(I didn't transfer school nor change major at all.)
Is there anybody who had same experience before?
