回複：太感謝863211的回帖。還有一個小問題沒有答案。

等現公司幫我延了三年再換工作是不是能少點麻煩？延期後再換工作，是不是就不用擔心公司withdraw the approved I-140？

-Correct, you can get another 3 year H1 and then, do H1 transfer. But if the I-140 is withdrawn later, you can not use it to extend your H1 again when your H1 expires again unless your new employer file another PERM/I-140 for you..