本人EB3C，排期马上就到了，但绿卡突然披了，我妻子（她是H1B，快过期了）没来得及交上去。朋友推荐可以考虑用following-to-join，但是又不知道该如何申请？
请问：
（1）这个申请过程是怎样的程序？麻烦吗？
-She Just files her I-485 as usual when your PD is current. Provide the copy of your I-485 approval notice and also green card copy (both sides) if you have received your green card.
（2）要多长时间我太太才能拿到？
-3 to 6 months normally.
我太太H1B签证快过期了，希望早点拿到
-She may file H1 extension to work continually.
