请问: 1)用AP可以在国内待多久? -Maxium is one year. You need to come back to US before the AP expires. 2)。 如果回国发展,持AP,如何保持485pending? -Nothing need to do. Just come back before the AP expires. 本人不是主申请人。住申请人仍在美国境内。 多谢