如果在美國不保留住房等， 為保證綠卡不被收回，是否回美證是必須的？ 想得到進一步的確認，畢竟申請的時候還是花了些力氣，不想輕易失去。
-You had better have the reentry permit if you often go to China and return to US within the two years. The principle is that you need to convince USCIS/CBP that you have the intent to live US permenantly.
-You had better have the reentry permit if you often go to China and return to US within the two years. The principle is that you need to convince USCIS/CBP that you have the intent to live US permenantly.
