回复：请猫老师或8老师等：岳母有绿卡，买了往返机票，但是由于被车撞了，恢复的不好，两年多没有回美国

现在想回来不知如何办理。去移民局看的信息是要去广州办SB1移民签证，但要Email预约，可是那个Email要求填的是网上送Email，可是这个Email要GUZ或者GZO号，否则的话送不了这个email。

这里是一link

http://guangzhou.usembassy-china.org.cn//immigrant-visa-unit-question.html
-This link  you cited is for immigration visa application, not SB-1 visa. For SB-1 visa application in the US Consulate in Guangzhou, see these links:
http://guangzhou.usembassy-china.org.cn/iv_*****1.html

http://guangzhou.usembassy-china.org.cn/*****1_visas_returning_residents.htmm

For more information about SB-1 visa, see this website of US Dept. of State:
http://travel.state.gov/visa/immigrants/info/info_1333.html

Also see this website:
http://www.immihelp.com/greencard/returning-resident-visa.html

她的绿卡是在美国办的。
她可不可以不办任何手续直接回来，入境会有问题吗？-Technically she can not use her green card because her green card is void. But sometimes certain CBP officer at the port of entry might allow her to enter US (depends on how lucky she is). Based on the immigration law, she needs to apply for the SB-1 visa. By the way, she needs to provide the evidences of her injury (e.g. Dr.'s letter, hospital proof, bills, etc.) that prevented her from return to US on time. After her SB-1 visa is approved, she still needs to apply for the immigration visa immediately in the US Consulate, and then use that immigration visa to enter US to reinstate her green card status (the US Consulate will give her instructions when her SB-1 visa is approved).

有没有别的途径？
-Another choice is that she may give up her green card, and then apply for the B2 visa to enter US and apply for the green card again (if she wants to later) as she did before.
  先谢谢各位！