1）如果父母一起申請B2來，父親一個月後回國，母親在這待三個月後申請綠卡，可以父母一起辦嗎？還是必須在國內遞父親的申請？
-You can file a separate I-130 for your father to apply for the immigration visa in China using consular processing (your father can not file I-485). Your mother can file I-485 together with your I-130 filing in US.
2）如果綠卡申請遞交了，父親還能不能在B2簽證過期前再返美？-No due to immigration intent. Another choice is that your father enter US using the B2 visa, then apply for the green card as your mother does.
（假定是多次往返簽證）還是必須等綠卡下來才能再來？
3）如果我用一個人的收入申請，應該按幾個人算呢？我一家三口，那麽我的收入是必須夠五人的，還是三人，父母加上我？-You, your kid (if any) and your parents if your spouse has his own income (you do not need to count your spouse into your household size in this case).
如果父母綠卡批了，而現移民法未變，還可以申請兄弟姐妹的話，要申請哥哥三口，那時我的收入又要按幾人算呢？是八人，我家三口加父母再加哥哥三口，還是六人，我加父母加哥哥三口？老公的收入足夠，隻是想如果可能的話，用自己一個人的收入。
多謝！
