-No problem at all.
我看回美證的instruction說好像不用辦回美證,
但為什麽大家都說要半年內入境呢?
-That is because if you stay outside US more than 6 months, your continuity of physical presence in US for the US citizenship application will be broken and you have to recounted it all over again. Thus, it will delay you to become a US citizen.