是不是：
1。需要 give up the green card in 北京领馆, and then apply for the B2 visa(visisor( to enter U？
-It is the best way.
2。give up the green card in 北京领馆需要多长时间？
-Immediately.
能在放弃绿卡的同时申请B2visa吗？
-Yes. of course. You need to follow the B-2 visa application instructions to make an appointment and provide the application documents.
谢谢。急等您的回答
