老师，感谢您前面的回复。想问问您
1. re-entry permit可以申请多少次？
-No limit, but if you continue to renew it without convincing reason, they may not approve it.
2. 如果我想永久海归，是否说只要每次在re-entry permit到期前回美国重新申请就肯定能保持绿卡吗？
-See above answer.
还是说这仍旧不保险，长期来讲要不放弃绿卡，要不入美国籍？
3. 另外，re-entry permit办理期间是否人必须在美国境内？
-After you do the fingerprinting, you can leave US.
申请大约需多长时间？
-about one to two months for the fingerprinting.
万分感谢！
