父母有綠卡，到2025 年有效。 他們於疫情期間（2020年11月）回國，本來沒想呆很長時間， 就沒有辦回美白皮書。 但由於疫情，通航原因在中國呆了差不多兩年。 如果今年底回美國，綠卡會被沒收嗎？有無什麽可以補救措施? 謝謝。
-Technically, the green card is void. So, it is possible to have trouble for your parents to use it to reenter US, depends on the IO at the port of entry.
There is SB-1 visa for them to reinstate their green card, but I don't think they can get the SB-1 visa because Covid 19 is not good enough as the reason which prevented from coming back to US on time for SB-1 visa application.
Your parents may just abandon the green card, then apply for the B2 visa to enter US. Then, you can sponsor them to apply for the green card again 90 days later after they enter US using B2 visa.
