回复：关于办绿卡的问题

1. 听说可以改EB2--> EB1, 我自己只是想试一把，如果I-140 （related to EB2) 已批，这时改还来得及吗？

-EB1 is irrelevant to your EB2, so you can do it anytime you want to.

2。我可能能办EB1（b), 如果自己的努力见效，换EB1(a）可以在什么时候换？

-Not need to waste your money to try EB1A if your employer can sponsor your EB1B.

3。粗粗看了皮匠老师的博客，了解到在I140阶段比较危险，到了485时候就比较好办，是吗？

-You may have misunderstood what Pjiang said.

4。485批了后，需等多久才能绿？

-"485批了" means you get the green card.

5。申请140或485时，探亲回国

-Not affect it if you will get H1/H4 visa.

或亲人来美是不是很危险

-Irrelevant.

，即有可能签证被拒？

6。EB1（b）+NIW是否能快点？还是要看形势？

-Not need to waste your money to try NIW because you already have an approved EB2 I-140.