急急急~ 美签6月20号过期，给的小白卡是8月23号，以哪个为准那？！ 

如题，给我的美签是13年的6约20号过期，但订在护照上的小白卡显示是8月23号过期，准备下周去西雅图购物，能不能去米国呀？！到底以哪个日期为准呀？ 还有还有，再次确认一下，我持有有效的大签，但小签今年3月已经过期了，去米国还能再回来吧？

美签过期，能持没过期的白卡进入美国必须是距上次离开美国没有超过30天 LZ参考下美国官网 The following temporary visitors whose nonimmigrant visas have expired, but who have a valid admission stamp or paper Form I-94, must reapply for and be issued nonimmigrant visas prior to their reentry to the U.S., if one or more of the following situations exists (this is not a complete listing): The nonimmigrant traveler with an expired nonimmigrant visa (but valid admission stamp or paper Form I-94): Applied for a new visa which has not yet been issued; Applied for a new visa and was denied; [color=#ff0000]Has been outside of the United States for more than thirty days[/color]; Has traveled to a country other than Canada, Mexico, or an adjacent island which is not included in the automatic revalidation provisions;