再請教一下，如果申請公民，一定要等到拿到公民紙才能出國嗎，
-Yes and get the US passport unless you renew your green card before you get the US citizen.
還是想申請綠卡一樣，可以有個臨時stamp出國可以回來呀，
-No. But if you file I-90 to renew your green card, you can bring the I-90 receipt notice to get the green card stamp at the local USCIS office if you leave US before you get the new green card. If you don't file I-90, then you can not get the green card stamp.
Of course, if you travel and come back before your current green card expires, then you can use this green card to come back (not need to renew it).
好像網上說公民要5個月或更多。
-Yes and get the US passport unless you renew your green card before you get the US citizen.
還是想申請綠卡一樣，可以有個臨時stamp出國可以回來呀，
-No. But if you file I-90 to renew your green card, you can bring the I-90 receipt notice to get the green card stamp at the local USCIS office if you leave US before you get the new green card. If you don't file I-90, then you can not get the green card stamp.
Of course, if you travel and come back before your current green card expires, then you can use this green card to come back (not need to renew it).
好像網上說公民要5個月或更多。
