一.由於一些原因,父母於四年前回國至今都沒有來美居住,綠卡自動放棄了,現在父母想辦理探親簽證來美,是否易通過? 該如何辦理? - When they turn in the GC at the consulate, they're usually issued a B-2 visa with longer Visa Expiration, say maybe 10 yrs.