我一直对“I551 pending”不是很清楚。因而，我就把我的护照上的officer的龙飞凤舞，拍照，然后email给Paul Heller。这是他的回复。
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Hope you had an eventful and relaxing long weekend; your category,
shown in your jpeg, IR6 (means 'immediate relative'); you became a LPR on
12/12/05,which means you will be eligible to file for USC 3 months prior to that
(as long as you are still married and living together in 'bliss'); pending
means: waiting for the actual GC to be physically produced and sent to
you in the mail. Lastly, Elephant story is a 'trademark' and copywrite of
HILG!
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我觉得Paul 人很nice，也很幽默，那个"Elephant story",让你开心一笑。他还很耐心，来来回回，我给他5次的email请教，我自己都不好意思了，最终还是有答复。