-Not really. Your parents normally will get the I-94 duration of 6 months at the port of entry and thus they can stay in US for 6 months.
如果他們現在去北京簽證,簽證官會給他們多長時間呢?
-This is not decided by the visa officer who only can give the visa or not. 他們多長時間 in U.S. is determined by the immigration officer at the port of entry when your parents enter U.S.
如果我的配偶過來,他是不是也一樣要在5月份出境,然後再申請H4再次入境?
-Yes or not, but he can extend his h4 within U.S if you file the H1 extension.
我聽說可以在美國給他申請h4,但不直到具體怎末做。
-You can get your H1 extension approved, then your spouse can use your new h1 approval notice to apply for the H4 visa and thus, he can enter US and stay as length as you.
Or he can get the H4 visa to enter U.S. using your current H1 approval notice and then, file the h4 extension within U.S. when you file your h1 extension (see above answer). You can file H1 extension first, and then he can file H4 extension later before his I-94 expires (May 2010).
希望各位大俠幫助,感激不盡。