请教大家，父母的绿卡因为在国内呆的时间太长作废了。现在想给他们重新申请绿卡，这种情况下获得批准的可能性大吗？
-Yes. No problem. But they need to abandon the old/invalid green card first, then you can sponsor them a new green card. See this link for how to abandon their green card:
Abandonment of Status (Form I-407) | U.S. Embassy & Consulates in China (usembassy-china.org.cn)
