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非常著急， 請求8老師解答， 謝謝了。

1. 老公Ph.D學位，現在持2014年10月生效的h1b工作，即將被雷（估計有2個月的時間），我h4, 如何維持合法身份繼續找工作。 聽說過h1b轉f1/b1,不知哪種更加可行。
2. H1b 轉b1, 在從b1轉h1b 會有很大風險-It is not a good idea to change to B-2 status because B-2 status is normally only valid for 6 months. Thus, you have to leave US after 6 months unless your spouse find a job and change B-2 back to H-1.
3. h1b轉f1 的gap問題：是不是申請轉換F-1，合法身份必須維持到I-20開始之前的三十天，也就是開學之前的三十天？如果9/1/2016開學， 必須保持h1b 到8/1/2016？-Not necessary. As long as your spouse files F-1 and you file F-2 before his is laid off, then you can stay in US legally to wait for thge F-1 approval. If your spouse want to change to F-1, he needs to do it as soon as possible because F-1 norammly takes a long to time to be approved.
4. 如果他的h1b保持不到開學之前三十天， 能否離境從加拿大申請f1簽證入境？因為大概在6月份能獲得加拿大的open work visa 。-If he works in Canada, it is OK for him to apply for the F-1 or H-1 visa in Canada, and then enter US using the visa.
5. 離境是否會影響H1b transfer：  如果他因為h1b在8/1號之前截至，暫時離開美國,  後來又在美國找到工作, 能否從加拿大簽h1b入境？-He needs to get the H-1 visa to reenter US and most likely he may have to get the H-1 visa in China unless he work or live in Canada or is a Canadian permanent resident or Canadian citizen.
6. 然後能不能直接辦理H1b transfer？因為隻用了2年h1b. -Yes. He does not need to get a new H-1 quote.
7. 公司如果要revoke h1b會通知嗎？-No.
8. h1b失效是從移民局revoke h1b 算起？-Technically, the H-1 status is invalid from the layoff date. But if he can find a job in about one to two month after the layoff, he should have no problem to do the H-1 transfer and stay in US and comtinue to work for the new employer, and he does not need to change his status or leave US. If he find a job too late, he may still do the H-1 transfer, but the H-1 transfer approval may have no I-94, thus he needs to go to China to get the H-1 visa to come back or he may need to change his status to F-1, etc. to stay in US before he find a job.