90幾歲健康老人，綠卡（親屬移民）明年1月初到期，綠卡期間短期離境過兩次，residency包括稅務等都正常。現在因私人事務需要回中國居住兩年左右，請教如何辦理能盡快走成並且reentry的時候不會有什麽麻煩，下麵哪個途徑相對合適。謝謝！
1，N400/N648, 這條路可行嗎（不符合65/20）?
-N-648 is medical certification for disability exceptions, so it seems your parent does not meet the requirement.
2, 綠卡renewal, file reentry permit. 是不是在5月到7月之間申請回美證最合適，等7月初遞交了綠卡延期，不必等收到I-131批準就可以離境，
-It takes for a longer time for I-131 prcessing, so your father had better file it earlier, e.g., file it in March or April and leave in July.
這個年紀不需要打指紋吧。這樣的理解對不對？
-Sometimes USCIS may use the old fingerprints for I-131, but sometimes USCIS may ask for new fingerprints. Because the fingerprints are used to produce the reentry permit (not for background check), USCIS may ask your parent to conduct it no matter what age you parent is if they do not use the old fingerprints.
3，現在就離境，到時候取消綠卡重新B2入境，或重新辦父母綠卡去廣州，這兩個途徑對他哪個更合適，失敗的概率大不大。
-It is fine, but why does your parent need to abandon the green card?
感謝！
