I am sorry I couldn't type Chinese from this machine. But you can reply in Chinese.
If I withdrawl the petition, will the system keep the application record? By the way, I just received the Receipt Notice. I don't think they process it yet. And my parents has no problem to visit us before. Every time got visa(B-2). But I am just wondering if I withdrawl the petition, can they get B-2 visa again next time? And can I apply the green card for them again when they are in USA? What's the process to withdraw the petition?
What's your suggestion for my case?
Thanks a lot.