其實所謂的六個月/三個月有效期是中國方麵的誤解。。。

剛剛在美國海關的官方網站上查到：

Six Month Club requirements:

As a general rule, passports must be valid for six months beyond the date the traveler will exit the U.S., however, the U.S. has signed agreements with a number of countries to waive this requirement. When such an agreement is in place, the passport must be valid for the entire period of the visitor's intended stay, but the additional six month validity period is not required.
If a U.S. visa has been issued on a passport that has expired, you should carry both your new passport and the expired passport containing your valid visa. There is no need to re-apply for a new visa unless the visa term has itself expired
*Lawful permanent residents (LPRs), refugees, and asylees will continue to be able to use their Alien Registration Card (Form I-551), issued by DHS, or other valid evidence of permanent residence status or refugee or asylee status to apply for entry to the United States.

我的理解是，六個月有效期是對非移民簽證而言。也就是說，你拿綠卡的話，六個月有效期並不適用在你身上。

再查：
What travel documents and identification are required for a foreign national or green card holder to enter the U.S.?

Foreign nationals that are lawful permanent residents of the U.S. must present a Permanent Resident Card (“Green Card”, INS Form I-551), a Reentry Permit (if gone for more than 1 year), or a Returning Resident Visa (if gone for 2 years or more), and their passport to reenter the United States if traveling from outside the Western Hemisphere. If traveling to Canada or Mexico, the Permanent Resident Card is sufficient, although, carrying a passport as well could help facilitate your reentry. (LPRs that are out of the U.S. for more than 180 days are subject to new immigrant inspection procedures as per 8 USC 1101.)

上麵這段並沒提到六個月的限製。

我認為，你理論上說是進美國沒問題。但中國邊防總是會誤解很多細節上的東西，例如你上次AP的事件。保險起見，還是換本新護照。

美國海關的官方網站：http://www.cbp.gov/