两年的婚姻绿卡5月份到期，刚申请换领十年绿卡，但因父亲在中国身体状况突然出现严重问题，医生已经口头发出危险通知。请教：1、在两年绿卡到期后如果十年绿卡不能及时发出（听说最近这种情况非常多），能否申请类似advance parole之类的文件？
-Did you conduct the fingerpirnting yet? If your conditional green card expired and you conduct the finerprinting, the IO will put a sticker note on your green card indicating that your conditional green card is extended for another year before you receive the permanent green card. Then, you can file I-131 to apply for reentry permit which allows you to stay in China for > one year < two years (you don't need to wait for the permanent green card to file I-131). You don't need to wait for the reentry permit apprvoal to leave US, but you need to conduct the fingerprinting for the reentry permit before you leave US.
If your conditional green card does not expire yet, you can file I-131 now and provide the copy of your I-751 Receipt Notice (i.e. the receipt notice of application for permanent green card)
2、如果我递交了换领申请后前往中国，但无法在两年绿卡到期前返回美国，这种情况该如何处理？
谢谢大家，并祝元宵节快乐。
