网上查了一下，有用的可能是这个link https://citizenpath.com/travel-abroad-green-card-expired/ 简要的说就是在过期一年之内可以renew，renew后的i90表可以在绿卡过期后一年以内作为临时的证明 Starting in January 2021, USCIS will also begin providing your temporary evidence of permanent resident status on this letter. Individuals who filed Form I-90 with a card that expires less than one year in the future, may use the letter in combination with the expired card. The letter will say, "This notice provides evidence of your lawful permanent resident status for 12 months from the expiration date on your Form I-551
自己顶一下
简要的说就是在过期一年之内可以renew，renew后的i90表可以在绿卡过期后一年以内作为临时的证明
Starting in January 2021, USCIS will also begin providing your temporary evidence of permanent resident status on this letter. Individuals who filed Form I-90 with a card that expires less than one year in the future, may use the letter in combination with the expired card. The letter will say, "This notice provides evidence of your lawful permanent resident status for 12 months from the expiration date on your Form I-551
太谢谢你了，我网上查了好久