回複：請教皮匠和各位大蝦，如何撤我的案子才沒有風險？

if your marriage is under USCIS investigation now, the result will decide you fate. You can switch your eligiblity from USC's spouse to USC's parent, but the approval decision will only be made after the investigation result is clear. If reuslt is good, you will get GC under either eligibility, if not good, your case will go to immigration court and let a judge decide.