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他們已經買好6月底回國機票， 現在file I-130 和485 還有944 等到一起批下來可能要大幾個月，恐怕也來不及。

-Even if they overstay in US, it will not affect their I-485 aprpoval, i.e. their illegal stay does not matter in their case because they are the immediate relatvies of you, a US citizen.

 我們是北京人， 能否在北京辦理而不是廣州呢？-No 還有， 能不能先交 130， 485 還有回美證， 然後之後補交 944 可以嗎？-Probably no. USCIS requires that the applicant needs to provide all of the required documents at one time. 謝謝！！