what is 绿卡章?

what is 绿卡章? thank you very much in advance.
what does it look like? did they print out your greencard number on passport or just write down your A#number, my ins officer was in a rush, and we could not ask him any more questions? He pushed us out! i am so puzzled now

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• 回复：what is 绿卡章??? -pokepig- ♀ (35 bytes) () 03/16/2004 postreply 12:34:01

• 回复：回复：what is 绿卡章??? -1greencard- ♀ (573 bytes) () 03/16/2004 postreply 14:06:49