是不是：
1。需要 give up the green card in 北京領館, and then apply for the B2 visa(visisor( to enter U？
-It is the best way.
2。give up the green card in 北京領館需要多長時間？
-Immediately.
能在放棄綠卡的同時申請B2visa嗎？
-Yes. of course. You need to follow the B-2 visa application instructions to make an appointment and provide the application documents.
謝謝。急等您的回答
