回複：回複：各位老師求助（pijiang,xiao bai tu 或其他高人）：雇主能在多長的期限內撤對你的銷綠卡申請？

mylawyer: you said above: "ER has no power to revoke your GC petition (I-140)." should be "ER has no right to revoke your GC petition (I-140)."
So you seems need to improve your english before answer people's question here.